diff --git a/.github/dependabot.yaml b/.github/dependabot.yaml
index ed8d5c8..8a5e7c0 100644
--- a/.github/dependabot.yaml
+++ b/.github/dependabot.yaml
@@ -36,6 +36,7 @@ updates:
   - package-ecosystem: "terraform"
     directories:
       - "infrastructure/modules/acm"
+      - "infrastructure/modules/alb"
       - "infrastructure/modules/api-gateway"
       - "infrastructure/modules/aws-backup-destination"
       - "infrastructure/modules/aws-backup-source"
diff --git a/README.md b/README.md
index bc97b9f..59c13cf 100644
--- a/README.md
+++ b/README.md
@@ -302,6 +302,7 @@ Rules:
 | Module | Wraps | Description |
 | --- | --- | --- |
 | `acm` | terraform-aws-modules/acm/aws | AWS Certificate Manager (ACM) certificate management |
+| `alb` | — | — |
 | `api-gateway` | — | API Gateway configuration with custom domain and integration |
 | `aws-backup-destination` | — | AWS Backup destination vault |
 | `aws-backup-source` | — | AWS Backup source configuration |
diff --git a/infrastructure/modules/alb/.terraform.lock.hcl b/infrastructure/modules/alb/.terraform.lock.hcl
new file mode 100644
index 0000000..994ba44
--- /dev/null
+++ b/infrastructure/modules/alb/.terraform.lock.hcl
@@ -0,0 +1,30 @@
+# This file is maintained automatically by "terraform init".
+# Manual edits may be lost in future updates.
+
+provider "registry.terraform.io/hashicorp/aws" {
+  version     = "6.52.0"
+  constraints = ">= 6.14.0, >= 6.28.0, >= 6.42.0"
+  hashes = [
+    "h1:8m5zm0JaUac+YikXZoZDTV7R0iYL+q3IvTL4Ac8GfDA=",
+    "h1:Dg9X3Gde96OCT3TovLKAKumnR64VqIIQ37m/9NRJ00Y=",
+    "h1:F1r7mTJ289EBvU7Z7XAvWMHUt3VJ3zSFH8SUjLPFiqM=",
+    "h1:iXIFHX6zIvG0hoEi1fImeuHG9V4JOop6O6L6f+MOL2c=",
+    "h1:lpXqosKH8yAahK3SA1P5Pdy1ziXJcY+blUidY0q9yGk=",
+    "zh:1ab1d78f2336fed42b4e13fa0077a0be9d86a7899897cda5b9f1a60051ec2e93",
+    "zh:1df11f5f252030803939a1c778931dbdcee1b1070b38b98d9a8cbfc26c2aeb8e",
+    "zh:20ec9af03c0c1f2f8582a8805d43a4cd1a0a65082308e00f025d87605715a88f",
+    "zh:2d5562ed0e7cb0892fb537c7989d25fdde1d0ac1f3a768ba15fa087985f2a0f5",
+    "zh:40d64f668961a172355c3d11d258e19172ffafb421c40d89266b129ed8f92a5d",
+    "zh:497792bccc33001247473bc32a148c067982cb3d245b8f3610afb920635d2235",
+    "zh:8011f9167082af74ed9257582a83d54e889388656597721b2691797f1dd6fb58",
+    "zh:8b10d1bbca51b0da1e1be0967ce75b039f2d5d86f2ca7339994a92d35cdf47a8",
+    "zh:9549647dbf7c913512c26fed6badd7bf24a29a36c2bd308536849303a85427da",
+    "zh:97c4b726cdbe48166f4b9e6a1230312a7933dc19dd139d941ca6aca86706eb33",
+    "zh:9b12af85486a96aedd8d7984b0ff811a4b42e3d88dad1a3fb4c0b580d04fa425",
+    "zh:a484bc8166278b546bfe53698fa9e0a919dffe3bfda3c8bf8a0fc6811b5b9e66",
+    "zh:aa96e76bd9f93e5395a553fccec485554a74acae46b3834b1296374eba4f010f",
+    "zh:cf290ee3d0dfe91b596445f860440d9f18826f7395ff785f83f70d36cedadd1c",
+    "zh:d56b6a79207663673f66d9ed378d705c1bd1b4d117eeb5e2be3938cf1b75b7be",
+    "zh:febef068317f8e49bd438ccdf2f54345fc3bc4b80a2699d9ab3c449d7e521d8e",
+  ]
+}
diff --git a/infrastructure/modules/alb/README.md b/infrastructure/modules/alb/README.md
new file mode 100644
index 0000000..e1a9786
--- /dev/null
+++ b/infrastructure/modules/alb/README.md
@@ -0,0 +1,282 @@
+# AWS Application / Network Load Balancer Terraform module
+
+Thin NHS wrapper around [terraform-aws-modules/alb/aws](https://registry.terraform.io/modules/terraform-aws-modules/alb/aws) that enforces the screening platform's baseline controls.
+
+## What this module enforces
+
+| Setting | Value | Reason |
+|---|---|---|
+| `drop_invalid_header_fields` | `true` (ALB only) | Prevents HTTP header injection attacks |
+
+## Usage
+
+### Internet-facing ALB with HTTPS
+
+```hcl
+module "alb" {
+  source = "../../modules/alb"
+
+  context     = module.this.context
+  stack       = "web"
+  name        = "bcss-web"
+  label_order = ["service", "environment", "stack", "name"]
+
+  vpc_id  = data.aws_vpc.selected.id
+  subnets = data.aws_subnets.public.ids
+
+  access_logs = {
+    bucket  = module.logs_bucket.id
+    prefix  = terraform.workspace
+    enabled = true
+  }
+
+  security_group_ingress_rules = {
+    http = {
+      from_port   = 80
+      to_port     = 80
+      ip_protocol = "tcp"
+      description = "HTTP from internet — redirected to HTTPS by listener"
+      cidr_ipv4   = "0.0.0.0/0"
+    }
+    https = {
+      from_port   = 443
+      to_port     = 443
+      ip_protocol = "tcp"
+      description = "HTTPS from internet"
+      cidr_ipv4   = "0.0.0.0/0"
+    }
+  }
+
+  security_group_egress_rules = {
+    https_out = {
+      from_port   = 443
+      to_port     = 443
+      ip_protocol = "tcp"
+      description = "HTTPS to targets"
+      cidr_ipv4   = "0.0.0.0/0"
+    }
+  }
+
+  # HTTP → HTTPS redirect on port 80 is added automatically by this module.
+  listeners = {
+    https = {
+      port            = 443
+      protocol        = "HTTPS"
+      ssl_policy      = "ELBSecurityPolicy-TLS13-1-2-Res-2021-06"
+      certificate_arn = local.acm_certificate_arn
+      forward = {
+        target_group_key = "web"
+      }
+    }
+  }
+
+  target_groups = {
+    web = {
+      port        = 443
+      protocol    = "HTTPS"
+      target_type = "ip"
+      health_check = {
+        protocol            = "HTTPS"
+        path                = "/health"
+        matcher             = "200"
+        healthy_threshold   = 2
+        unhealthy_threshold = 2
+        interval            = 60
+      }
+    }
+  }
+}
+```
+
+### ALB with WAF association
+
+```hcl
+module "alb" {
+  source = "../../modules/alb"
+
+  context = module.this.context
+  name    = "bcss-web"
+
+  vpc_id  = data.aws_vpc.selected.id
+  subnets = data.aws_subnets.public.ids
+
+  listeners     = { ... }
+  target_groups = { ... }
+
+  web_acl_arn = module.waf.web_acl_arn
+}
+```
+
+### Internal NLB
+
+```hcl
+module "nlb" {
+  source = "../../modules/alb"
+
+  context = module.this.context
+  name    = "internal-nlb"
+
+  load_balancer_type = "network"
+  internal           = true
+  vpc_id             = data.aws_vpc.selected.id
+  subnets            = data.aws_subnets.private.ids
+
+  security_group_ingress_rules = {
+    tcp = {
+      from_port   = 8080
+      to_port     = 8080
+      ip_protocol = "tcp"
+      description = "Internal TCP traffic"
+      cidr_ipv4   = data.aws_vpc.selected.cidr_block
+    }
+  }
+
+  security_group_egress_rules = {
+    tcp_out = {
+      from_port   = 8080
+      to_port     = 8080
+      ip_protocol = "tcp"
+      cidr_ipv4   = data.aws_vpc.selected.cidr_block
+    }
+  }
+
+  listeners = {
+    tcp = {
+      port     = 8080
+      protocol = "TCP"
+      forward  = { target_group_key = "service" }
+    }
+  }
+
+  target_groups = {
+    service = {
+      port        = 8080
+      protocol    = "TCP"
+      target_type = "ip"
+      health_check = {
+        protocol = "TCP"
+        port     = "8080"
+      }
+    }
+  }
+}
+```
+
+## Conventions
+
+* The load balancer name is derived from `module.this.id` and cannot be overridden — pass `context`, `name`, and `label_order` to control the generated name.
+* `internal` defaults to `false` (internet-facing). Set `internal = true` for ALBs and NLBs that should only be reachable from within the VPC.
+* `enable_deletion_protection` defaults to `true`. Set it to `false` for non-production environments where the load balancer needs to be freely destroyed.
+* HTTP-to-HTTPS redirect on port 80 is added automatically for ALBs (`enable_http_https_redirect = true` by default). Set to `false` if you need custom HTTP listener behaviour or the ALB is not serving HTTPS traffic. Does not apply to NLBs.
+* Security group rules are caller-supplied via `security_group_ingress_rules` and `security_group_egress_rules`. This supports both ALB (HTTP/HTTPS) and NLB (TCP/TLS) patterns without constraining port numbers.
+* Access logging is optional. Supply an S3 bucket ARN via `access_logs` to enable it. NHS production environments should always enable access logging.
+* For NLBs, `drop_invalid_header_fields` is set to `null` automatically — this argument is only valid for ALBs.
+
+## What this module does NOT do
+
+* Create SSL/TLS certificates — use the `acm` module and pass the certificate ARN into `listeners`.
+* Create an S3 bucket for access logs — use the `s3-bucket` module and pass the bucket ID via `access_logs.bucket`.
+* Create Route53 DNS records — create an alias record pointing to `module.alb.dns_name` and `module.alb.zone_id` in your stack.
+* Create a WAF Web ACL — use the `waf` module and pass the ARN via `web_acl_arn`.
+* Enforce a minimum TLS policy — callers must specify `ssl_policy` on HTTPS listeners; use `ELBSecurityPolicy-TLS13-1-2-Res-2021-06` or later.
+
+## Outputs
+
+| Name | Description | Used by |
+|---|---|---|
+| `arn` | ARN of the load balancer | WAF ACL association |
+| `dns_name` | DNS name of the load balancer | Route53 alias records |
+| `zone_id` | Hosted zone ID of the load balancer | Route53 alias records |
+| `listeners` | Map of listeners and their attributes | ECS task `depends_on` |
+| `target_groups` | Map of target groups and their attributes | ECS task `target_group_arn` |
+| `security_group_id` | ID of the load balancer security group | ECS task security group rules |
+
+<!-- vale off -->
+<!-- markdownlint-disable -->
+<!-- BEGIN_TF_DOCS -->
+## Requirements
+
+| Name | Version |
+| ---- | ------- |
+| <a name="requirement_terraform"></a> [terraform](#requirement\_terraform) | >= 1.13 |
+| <a name="requirement_aws"></a> [aws](#requirement\_aws) | >= 6.42 |
+
+## Providers
+
+No providers.
+
+## Modules
+
+| Name | Source | Version |
+| ---- | ------ | ------- |
+| <a name="module_alb"></a> [alb](#module\_alb) | terraform-aws-modules/alb/aws | 10.5.0 |
+| <a name="module_this"></a> [this](#module\_this) | ../tags | n/a |
+
+## Resources
+
+No resources.
+
+## Inputs
+
+| Name | Description | Type | Default | Required |
+| ---- | ----------- | ---- | ------- | :------: |
+| <a name="input_access_logs"></a> [access\_logs](#input\_access\_logs) | S3 access log delivery configuration. When null, access logging is disabled. | <pre>object({<br/>    bucket  = string<br/>    prefix  = optional(string)<br/>    enabled = optional(bool, true)<br/>  })</pre> | `null` | no |
+| <a name="input_additional_tag_map"></a> [additional\_tag\_map](#input\_additional\_tag\_map) | Additional key-value pairs to add to each map in `tags_as_list_of_maps`. Not added to `tags` or `id`.<br/>This is for some rare cases where resources want additional configuration of tags<br/>and therefore take a list of maps with tag key, value, and additional configuration. | `map(string)` | `{}` | no |
+| <a name="input_application_role"></a> [application\_role](#input\_application\_role) | The role the application is performing | `string` | `"General"` | no |
+| <a name="input_attributes"></a> [attributes](#input\_attributes) | ID element. Additional attributes (e.g. `workers` or `cluster`) to add to `id`,<br/>in the order they appear in the list. New attributes are appended to the<br/>end of the list. The elements of the list are joined by the `delimiter`<br/>and treated as a single ID element. | `list(string)` | `[]` | no |
+| <a name="input_aws_region"></a> [aws\_region](#input\_aws\_region) | The AWS region | `string` | `"eu-west-2"` | no |
+| <a name="input_context"></a> [context](#input\_context) | Single object for setting entire context at once.<br/>See description of individual variables for details.<br/>Leave string and numeric variables as `null` to use default value.<br/>Individual variable settings (non-null) override settings in context object,<br/>except for attributes, tags, and additional\_tag\_map, which are merged. | `any` | <pre>{<br/>  "additional_tag_map": {},<br/>  "attributes": [],<br/>  "delimiter": null,<br/>  "descriptor_formats": {},<br/>  "enabled": true,<br/>  "environment": null,<br/>  "id_length_limit": null,<br/>  "label_key_case": null,<br/>  "label_order": [],<br/>  "label_value_case": null,<br/>  "labels_as_tags": [<br/>    "unset"<br/>  ],<br/>  "name": null,<br/>  "project": null,<br/>  "regex_replace_chars": null,<br/>  "region": null,<br/>  "service": null,<br/>  "stack": null,<br/>  "tags": {},<br/>  "terraform_source": null,<br/>  "workspace": null<br/>}</pre> | no |
+| <a name="input_data_classification"></a> [data\_classification](#input\_data\_classification) | Used to identify the data classification of the resource, e.g 1-5 | `string` | `"n/a"` | no |
+| <a name="input_data_type"></a> [data\_type](#input\_data\_type) | The tag data\_type | `string` | `"None"` | no |
+| <a name="input_delimiter"></a> [delimiter](#input\_delimiter) | Delimiter to be used between ID elements.<br/>Defaults to `-` (hyphen). Set to `""` to use no delimiter at all. | `string` | `null` | no |
+| <a name="input_descriptor_formats"></a> [descriptor\_formats](#input\_descriptor\_formats) | Describe additional descriptors to be output in the `descriptors` output map.<br/>Map of maps. Keys are names of descriptors. Values are maps of the form<br/>`{<br/>    format = string<br/>    labels = list(string)<br/>}`<br/>(Type is `any` so the map values can later be enhanced to provide additional options.)<br/>`format` is a Terraform format string to be passed to the `format()` function.<br/>`labels` is a list of labels, in order, to pass to `format()` function.<br/>Label values will be normalized before being passed to `format()` so they will be<br/>identical to how they appear in `id`.<br/>Default is `{}` (`descriptors` output will be empty). | `any` | `{}` | no |
+| <a name="input_enable_deletion_protection"></a> [enable\_deletion\_protection](#input\_enable\_deletion\_protection) | When true, deletion protection is enabled on the load balancer. Set to false for non-production environments where the load balancer needs to be freely destroyed. | `bool` | `true` | no |
+| <a name="input_enable_http_https_redirect"></a> [enable\_http\_https\_redirect](#input\_enable\_http\_https\_redirect) | When true, automatically adds a port-80 HTTP-to-HTTPS (301) redirect listener. Only applies when load\_balancer\_type is 'application'. Set to false if you are defining your own HTTP listener or the ALB is not serving HTTPS traffic. | `bool` | `true` | no |
+| <a name="input_enabled"></a> [enabled](#input\_enabled) | Set to false to prevent the module from creating any resources | `bool` | `null` | no |
+| <a name="input_environment"></a> [environment](#input\_environment) | ID element. Usually used to indicate role, e.g. 'prd', 'dev', 'test', 'preprod', 'prod', 'uat' | `string` | `null` | no |
+| <a name="input_id_length_limit"></a> [id\_length\_limit](#input\_id\_length\_limit) | Limit `id` to this many characters (minimum 6).<br/>Set to `0` for unlimited length.<br/>Set to `null` for keep the existing setting, which defaults to `0`.<br/>Does not affect `id_full`. | `number` | `null` | no |
+| <a name="input_internal"></a> [internal](#input\_internal) | When true, the load balancer is internal (private). When false, it is internet-facing. Defaults to false. | `bool` | `false` | no |
+| <a name="input_label_key_case"></a> [label\_key\_case](#input\_label\_key\_case) | Controls the letter case of the `tags` keys (label names) for tags generated by this module.<br/>Does not affect keys of tags passed in via the `tags` input.<br/>Possible values: `lower`, `title`, `upper`.<br/>Default value: `title`. | `string` | `null` | no |
+| <a name="input_label_order"></a> [label\_order](#input\_label\_order) | The order in which the labels (ID elements) appear in the `id`.<br/>Defaults to ["namespace", "environment", "stage", "name", "attributes"].<br/>You can omit any of the 6 labels ("tenant" is the 6th), but at least one must be present. | `list(string)` | `null` | no |
+| <a name="input_label_value_case"></a> [label\_value\_case](#input\_label\_value\_case) | Controls the letter case of ID elements (labels) as included in `id`,<br/>set as tag values, and output by this module individually.<br/>Does not affect values of tags passed in via the `tags` input.<br/>Possible values: `lower`, `title`, `upper` and `none` (no transformation).<br/>Set this to `title` and set `delimiter` to `""` to yield Pascal Case IDs.<br/>Default value: `lower`. | `string` | `null` | no |
+| <a name="input_labels_as_tags"></a> [labels\_as\_tags](#input\_labels\_as\_tags) | Set of labels (ID elements) to include as tags in the `tags` output.<br/>Default is to include all labels.<br/>Tags with empty values will not be included in the `tags` output.<br/>Set to `[]` to suppress all generated tags.<br/>**Notes:**<br/>  The value of the `name` tag, if included, will be the `id`, not the `name`.<br/>  Unlike other `null-label` inputs, the initial setting of `labels_as_tags` cannot be<br/>  changed in later chained modules. Attempts to change it will be silently ignored. | `set(string)` | <pre>[<br/>  "default"<br/>]</pre> | no |
+| <a name="input_listeners"></a> [listeners](#input\_listeners) | Map of listener configurations to create. Passed directly to the upstream module.<br/>For ALB, define HTTPS and HTTP listeners here. For NLB, define TCP/TLS listeners.<br/>See https://registry.terraform.io/modules/terraform-aws-modules/alb/aws/latest<br/>for full schema documentation. | `any` | `{}` | no |
+| <a name="input_load_balancer_type"></a> [load\_balancer\_type](#input\_load\_balancer\_type) | Type of load balancer to create. Either 'application' (ALB) or 'network' (NLB). | `string` | `"application"` | no |
+| <a name="input_name"></a> [name](#input\_name) | ID element. Usually the component or solution name, e.g. 'app' or 'jenkins'.<br/>This is the only ID element not also included as a `tag`.<br/>The "name" tag is set to the full `id` string. There is no tag with the value of the `name` input. | `string` | `null` | no |
+| <a name="input_on_off_pattern"></a> [on\_off\_pattern](#input\_on\_off\_pattern) | Used to turn resources on and off based on a time pattern | `string` | `"n/a"` | no |
+| <a name="input_owner"></a> [owner](#input\_owner) | The name and or NHS.net email address of the service owner | `string` | `"None"` | no |
+| <a name="input_project"></a> [project](#input\_project) | ID element. A project identifier, indicating the name or role of the project the resource is for, such as `website` or `api` | `string` | `null` | no |
+| <a name="input_public_facing"></a> [public\_facing](#input\_public\_facing) | Whether this resource is public facing | `bool` | `false` | no |
+| <a name="input_regex_replace_chars"></a> [regex\_replace\_chars](#input\_regex\_replace\_chars) | Terraform regular expression (regex) string.<br/>Characters matching the regex will be removed from the ID elements.<br/>If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits. | `string` | `null` | no |
+| <a name="input_region"></a> [region](#input\_region) | ID element \_(Rarely used, not included by default)\_.  Usually an abbreviation of the selected AWS region e.g. 'uw2', 'ew2' or 'gbl' for resources like IAM roles that have no region | `string` | `null` | no |
+| <a name="input_security_group_egress_rules"></a> [security\_group\_egress\_rules](#input\_security\_group\_egress\_rules) | Map of egress rules to add to the load balancer security group.<br/>Example:<br/>  security\_group\_egress\_rules = {<br/>    https\_out = {<br/>      from\_port   = 443<br/>      to\_port     = 443<br/>      ip\_protocol = "tcp"<br/>      cidr\_ipv4   = "0.0.0.0/0"<br/>    }<br/>  } | `any` | `{}` | no |
+| <a name="input_security_group_ingress_rules"></a> [security\_group\_ingress\_rules](#input\_security\_group\_ingress\_rules) | Map of ingress rules to add to the load balancer security group.<br/>Each key is a logical name; each value is an object describing the rule.<br/>Example:<br/>  security\_group\_ingress\_rules = {<br/>    https = {<br/>      from\_port   = 443<br/>      to\_port     = 443<br/>      ip\_protocol = "tcp"<br/>      description = "HTTPS from internet"<br/>      cidr\_ipv4   = "0.0.0.0/0"<br/>    }<br/>  } | `any` | `{}` | no |
+| <a name="input_service"></a> [service](#input\_service) | ID element. Usually an abbreviation of your service directorate name, e.g. 'bcss' or 'csms', to help ensure generated IDs are globally unique | `string` | `null` | no |
+| <a name="input_service_category"></a> [service\_category](#input\_service\_category) | The tag service\_category | `string` | `"n/a"` | no |
+| <a name="input_stack"></a> [stack](#input\_stack) | ID element. The name of the stack/component, e.g. `database`, `web`, `waf`, `eks` | `string` | `null` | no |
+| <a name="input_subnets"></a> [subnets](#input\_subnets) | List of subnet IDs to attach to the load balancer. For internet-facing ALBs, use public subnets. | `list(string)` | n/a | yes |
+| <a name="input_tag_version"></a> [tag\_version](#input\_tag\_version) | Used to identify the tagging version in use | `string` | `"1.0"` | no |
+| <a name="input_tags"></a> [tags](#input\_tags) | Additional tags (e.g. `{'BusinessUnit': 'XYZ'}`).<br/>Neither the tag keys nor the tag values will be modified by this module. | `map(string)` | `{}` | no |
+| <a name="input_target_groups"></a> [target\_groups](#input\_target\_groups) | Map of target group configurations to create. Passed directly to the upstream module.<br/>See https://registry.terraform.io/modules/terraform-aws-modules/alb/aws/latest<br/>for full schema documentation. | `any` | `{}` | no |
+| <a name="input_terraform_source"></a> [terraform\_source](#input\_terraform\_source) | Source location to record in the Terraform\_source tag. Defaults to this module path. | `string` | `null` | no |
+| <a name="input_tool"></a> [tool](#input\_tool) | The tool used to deploy the resource | `string` | `"Terraform"` | no |
+| <a name="input_vpc_id"></a> [vpc\_id](#input\_vpc\_id) | ID of the VPC in which the load balancer security group will be created. | `string` | n/a | yes |
+| <a name="input_web_acl_arn"></a> [web\_acl\_arn](#input\_web\_acl\_arn) | ARN of a WAFv2 Web ACL to associate with the load balancer. Only valid for ALB. When null, no WAF association is created. | `string` | `null` | no |
+| <a name="input_workspace"></a> [workspace](#input\_workspace) | ID element. The Terraform workspace, to help ensure generated IDs are unique across workspaces | `string` | `null` | no |
+
+## Outputs
+
+| Name | Description |
+| ---- | ----------- |
+| <a name="output_arn"></a> [arn](#output\_arn) | ARN of the load balancer. Used by WAF to associate a Web ACL. |
+| <a name="output_arn_suffix"></a> [arn\_suffix](#output\_arn\_suffix) | ARN suffix of the load balancer. Used with CloudWatch metrics. |
+| <a name="output_dns_name"></a> [dns\_name](#output\_dns\_name) | DNS name of the load balancer. Used by Route53 alias records. |
+| <a name="output_id"></a> [id](#output\_id) | ID of the load balancer (same as ARN). |
+| <a name="output_listeners"></a> [listeners](#output\_listeners) | Map of listeners created and their attributes. ECS tasks use this for depends\_on. |
+| <a name="output_security_group_arn"></a> [security\_group\_arn](#output\_security\_group\_arn) | ARN of the security group created for the load balancer. |
+| <a name="output_security_group_id"></a> [security\_group\_id](#output\_security\_group\_id) | ID of the security group created for the load balancer. |
+| <a name="output_target_groups"></a> [target\_groups](#output\_target\_groups) | Map of target groups created and their attributes. ECS tasks reference target\_group ARNs from here. |
+| <a name="output_zone_id"></a> [zone\_id](#output\_zone\_id) | Hosted zone ID of the load balancer. Used by Route53 alias records. |
+<!-- END_TF_DOCS -->
+<!-- markdownlint-enable -->
+<!-- vale on -->
diff --git a/infrastructure/modules/alb/context.tf b/infrastructure/modules/alb/context.tf
new file mode 100644
index 0000000..f813fc8
--- /dev/null
+++ b/infrastructure/modules/alb/context.tf
@@ -0,0 +1,374 @@
+# tflint-ignore-file: terraform_standard_module_structure, terraform_unused_declarations
+#
+# ONLY EDIT THIS FILE IN github.com/NHSDigital/screening-terraform-modules-aws/infrastructure/modules/tags
+# All other instances of this file should be a copy of that one
+#
+#
+# Copy this file from https://github.com/NHSDigital/screening-terraform-modules-aws/blob/master/infrastructure/modules/tags/exports/context.tf
+# and then place it in your Terraform module to automatically get
+# tag module standard configuration inputs suitable for passing
+# to other modules.
+#
+# curl -sL https://raw.githubusercontent.com/NHSDigital/screening-terraform-modules-aws/master/infrastructure/modules/tags/exports/context.tf -o context.tf
+#
+# Modules should access the whole context as `module.this.context`
+# to get the input variables with nulls for defaults,
+# for example `context = module.this.context`,
+# and access individual variables as `module.this.<var>`,
+# with final values filled in.
+#
+# For example, when using defaults, `module.this.context.delimiter`
+# will be null, and `module.this.delimiter` will be `-` (hyphen).
+#
+
+module "this" {
+  source = "../tags"
+
+  service             = var.service
+  project             = var.project
+  region              = var.region
+  environment         = var.environment
+  stack               = var.stack
+  workspace           = var.workspace
+  name                = var.name
+  delimiter           = var.delimiter
+  attributes          = var.attributes
+  tags                = var.tags
+  additional_tag_map  = var.additional_tag_map
+  label_order         = var.label_order
+  regex_replace_chars = var.regex_replace_chars
+  id_length_limit     = var.id_length_limit
+  label_key_case      = var.label_key_case
+  label_value_case    = var.label_value_case
+  terraform_source    = coalesce(var.terraform_source, path.module)
+  descriptor_formats  = var.descriptor_formats
+  labels_as_tags      = var.labels_as_tags
+
+  context = var.context
+}
+
+# Copy contents of screening-terraform-modules-aws/tags/variables.tf here
+variable "aws_region" {
+  type        = string
+  description = "The AWS region"
+  default     = "eu-west-2"
+  validation {
+    condition     = contains(["eu-west-1", "eu-west-2", "us-east-1"], var.aws_region)
+    error_message = "AWS Region must be one of eu-west-1, eu-west-2, us-east-1"
+  }
+}
+
+variable "context" {
+  type = any
+  default = {
+    enabled             = true
+    service             = null
+    project             = null
+    region              = null
+    environment         = null
+    stack               = null
+    workspace           = null
+    name                = null
+    delimiter           = null
+    attributes          = []
+    tags                = {}
+    additional_tag_map  = {}
+    regex_replace_chars = null
+    label_order         = []
+    id_length_limit     = null
+    label_key_case      = null
+    label_value_case    = null
+    terraform_source    = null
+    descriptor_formats  = {}
+    # Note: we have to use [] instead of null for unset lists due to
+    # https://github.com/hashicorp/terraform/issues/28137
+    # which was not fixed until Terraform 1.0.0,
+    # but we want the default to be all the labels in `label_order`
+    # and we want users to be able to prevent all tag generation
+    # by setting `labels_as_tags` to `[]`, so we need
+    # a different sentinel to indicate "default"
+    labels_as_tags = ["unset"]
+  }
+  description = <<-EOT
+    Single object for setting entire context at once.
+    See description of individual variables for details.
+    Leave string and numeric variables as `null` to use default value.
+    Individual variable settings (non-null) override settings in context object,
+    except for attributes, tags, and additional_tag_map, which are merged.
+  EOT
+
+  validation {
+    condition     = lookup(var.context, "label_key_case", null) == null ? true : contains(["lower", "title", "upper"], var.context["label_key_case"])
+    error_message = "Allowed values: `lower`, `title`, `upper`."
+  }
+
+  validation {
+    condition     = lookup(var.context, "label_value_case", null) == null ? true : contains(["lower", "title", "upper", "none"], var.context["label_value_case"])
+    error_message = "Allowed values: `lower`, `title`, `upper`, `none`."
+  }
+}
+
+variable "terraform_source" {
+  type        = string
+  default     = null
+  description = "Source location to record in the Terraform_source tag. Defaults to this module path."
+}
+
+variable "enabled" {
+  type        = bool
+  default     = null
+  description = "Set to false to prevent the module from creating any resources"
+}
+
+variable "service" {
+  type        = string
+  default     = null
+  description = "ID element. Usually an abbreviation of your service directorate name, e.g. 'bcss' or 'csms', to help ensure generated IDs are globally unique"
+}
+
+variable "region" {
+  type        = string
+  default     = null
+  description = "ID element _(Rarely used, not included by default)_.  Usually an abbreviation of the selected AWS region e.g. 'uw2', 'ew2' or 'gbl' for resources like IAM roles that have no region"
+}
+
+variable "project" {
+  type        = string
+  default     = null
+  description = "ID element. A project identifier, indicating the name or role of the project the resource is for, such as `website` or `api`"
+}
+variable "stack" {
+  type        = string
+  default     = null
+  description = "ID element. The name of the stack/component, e.g. `database`, `web`, `waf`, `eks`"
+}
+variable "workspace" {
+  type        = string
+  default     = null
+  description = "ID element. The Terraform workspace, to help ensure generated IDs are unique across workspaces"
+}
+variable "environment" {
+  type        = string
+  default     = null
+  description = "ID element. Usually used to indicate role, e.g. 'prd', 'dev', 'test', 'preprod', 'prod', 'uat'"
+}
+
+variable "name" {
+  type        = string
+  default     = null
+  description = <<-EOT
+    ID element. Usually the component or solution name, e.g. 'app' or 'jenkins'.
+    This is the only ID element not also included as a `tag`.
+    The "name" tag is set to the full `id` string. There is no tag with the value of the `name` input.
+    EOT
+}
+
+variable "delimiter" {
+  type        = string
+  default     = null
+  description = <<-EOT
+    Delimiter to be used between ID elements.
+    Defaults to `-` (hyphen). Set to `""` to use no delimiter at all.
+  EOT
+}
+
+variable "attributes" {
+  type        = list(string)
+  default     = []
+  description = <<-EOT
+    ID element. Additional attributes (e.g. `workers` or `cluster`) to add to `id`,
+    in the order they appear in the list. New attributes are appended to the
+    end of the list. The elements of the list are joined by the `delimiter`
+    and treated as a single ID element.
+    EOT
+}
+
+variable "labels_as_tags" {
+  type        = set(string)
+  default     = ["default"]
+  description = <<-EOT
+    Set of labels (ID elements) to include as tags in the `tags` output.
+    Default is to include all labels.
+    Tags with empty values will not be included in the `tags` output.
+    Set to `[]` to suppress all generated tags.
+    **Notes:**
+      The value of the `name` tag, if included, will be the `id`, not the `name`.
+      Unlike other `null-label` inputs, the initial setting of `labels_as_tags` cannot be
+      changed in later chained modules. Attempts to change it will be silently ignored.
+    EOT
+}
+
+variable "tags" {
+  type        = map(string)
+  default     = {}
+  description = <<-EOT
+    Additional tags (e.g. `{'BusinessUnit': 'XYZ'}`).
+    Neither the tag keys nor the tag values will be modified by this module.
+    EOT
+}
+
+variable "additional_tag_map" {
+  type        = map(string)
+  default     = {}
+  description = <<-EOT
+    Additional key-value pairs to add to each map in `tags_as_list_of_maps`. Not added to `tags` or `id`.
+    This is for some rare cases where resources want additional configuration of tags
+    and therefore take a list of maps with tag key, value, and additional configuration.
+    EOT
+}
+
+variable "label_order" {
+  type        = list(string)
+  default     = null
+  description = <<-EOT
+    The order in which the labels (ID elements) appear in the `id`.
+    Defaults to ["namespace", "environment", "stage", "name", "attributes"].
+    You can omit any of the 6 labels ("tenant" is the 6th), but at least one must be present.
+    EOT
+}
+
+variable "regex_replace_chars" {
+  type        = string
+  default     = null
+  description = <<-EOT
+    Terraform regular expression (regex) string.
+    Characters matching the regex will be removed from the ID elements.
+    If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits.
+  EOT
+}
+
+variable "id_length_limit" {
+  type        = number
+  default     = null
+  description = <<-EOT
+    Limit `id` to this many characters (minimum 6).
+    Set to `0` for unlimited length.
+    Set to `null` for keep the existing setting, which defaults to `0`.
+    Does not affect `id_full`.
+  EOT
+  validation {
+    condition     = var.id_length_limit == null ? true : var.id_length_limit >= 6 || var.id_length_limit == 0
+    error_message = "The id_length_limit must be >= 6 if supplied (not null), or 0 for unlimited length."
+  }
+}
+
+variable "label_key_case" {
+  type        = string
+  default     = null
+  description = <<-EOT
+    Controls the letter case of the `tags` keys (label names) for tags generated by this module.
+    Does not affect keys of tags passed in via the `tags` input.
+    Possible values: `lower`, `title`, `upper`.
+    Default value: `title`.
+  EOT
+
+  validation {
+    condition     = var.label_key_case == null ? true : contains(["lower", "title", "upper"], var.label_key_case)
+    error_message = "Allowed values: `lower`, `title`, `upper`."
+  }
+}
+
+variable "label_value_case" {
+  type        = string
+  default     = null
+  description = <<-EOT
+    Controls the letter case of ID elements (labels) as included in `id`,
+    set as tag values, and output by this module individually.
+    Does not affect values of tags passed in via the `tags` input.
+    Possible values: `lower`, `title`, `upper` and `none` (no transformation).
+    Set this to `title` and set `delimiter` to `""` to yield Pascal Case IDs.
+    Default value: `lower`.
+  EOT
+
+  validation {
+    condition     = var.label_value_case == null ? true : contains(["lower", "title", "upper", "none"], var.label_value_case)
+    error_message = "Allowed values: `lower`, `title`, `upper`, `none`."
+  }
+}
+
+variable "descriptor_formats" {
+  type        = any
+  default     = {}
+  description = <<-EOT
+    Describe additional descriptors to be output in the `descriptors` output map.
+    Map of maps. Keys are names of descriptors. Values are maps of the form
+    `{
+        format = string
+        labels = list(string)
+    }`
+    (Type is `any` so the map values can later be enhanced to provide additional options.)
+    `format` is a Terraform format string to be passed to the `format()` function.
+    `labels` is a list of labels, in order, to pass to `format()` function.
+    Label values will be normalized before being passed to `format()` so they will be
+    identical to how they appear in `id`.
+    Default is `{}` (`descriptors` output will be empty).
+    EOT
+}
+
+variable "owner" {
+  type        = string
+  description = "The name and or NHS.net email address of the service owner"
+  default     = "None"
+}
+
+variable "tag_version" {
+  type        = string
+  description = "Used to identify the tagging version in use"
+  default     = "1.0"
+}
+
+variable "data_classification" {
+  type        = string
+  description = "Used to identify the data classification of the resource, e.g 1-5"
+  default     = "n/a"
+  validation {
+    condition     = contains(["n/a", "1", "2", "3", "4", "5"], var.data_classification)
+    error_message = "Data Classification must be \"n/a\" or between 1-5"
+  }
+}
+
+variable "data_type" {
+  type        = string
+  description = "The tag data_type"
+  default     = "None"
+  validation {
+    condition     = contains(["None", "PCD", "PID", "Anonymised", "UserAccount", "Audit"], var.data_type)
+    error_message = "Data Type must be one of None, PCD, PID, Anonymised, UserAccount, Audit"
+  }
+}
+
+
+variable "public_facing" {
+  type        = bool
+  description = "Whether this resource is public facing"
+  default     = false
+}
+
+variable "service_category" {
+  type        = string
+  description = "The tag service_category"
+  default     = "n/a"
+  validation {
+    condition     = contains(["n/a", "Bronze", "Silver", "Gold", "Platinum"], var.service_category)
+    error_message = "The Service Category must be one of n/a, Bronze, Silver, Gold, Platinum"
+  }
+}
+variable "on_off_pattern" {
+  type        = string
+  description = "Used to turn resources on and off based on a time pattern"
+  default     = "n/a"
+}
+
+variable "application_role" {
+  type        = string
+  description = "The role the application is performing"
+  default     = "General"
+}
+
+variable "tool" {
+  type        = string
+  description = "The tool used to deploy the resource"
+  default     = "Terraform"
+}
+
+#### End of copy of screening-terraform-modules-aws/tags/variables.tf
diff --git a/infrastructure/modules/alb/main.tf b/infrastructure/modules/alb/main.tf
new file mode 100644
index 0000000..6472f30
--- /dev/null
+++ b/infrastructure/modules/alb/main.tf
@@ -0,0 +1,87 @@
+################################################################
+# Application / Network Load Balancer
+#
+# Thin NHS wrapper around the community ALB module that enforces
+# the screening platform's baseline controls:
+#
+#   * Deletion protection: enabled by default; set enable_deletion_protection = false for non-prod
+#   * Invalid header fields: always dropped (ALB only)
+#   * HTTP→HTTPS redirect: automatic on port 80 for ALBs (disable with enable_http_https_redirect = false)
+#   * Naming:  derived from context labels via module.this.id
+#   * Tagging: all NHS-required tags applied automatically
+#   * Enabled flag: create = module.this.enabled
+#
+# Inputs intentionally NOT exposed (hardcoded below):
+#   - drop_invalid_header_fields → always true (ALB); null (NLB)
+################################################################
+
+locals {
+  # Inject an HTTP → HTTPS redirect listener on port 80 when enabled (ALB only).
+  # Callers can override by providing their own "http-redirect" key in var.listeners.
+  http_redirect_listener = var.enable_http_https_redirect && var.load_balancer_type == "application" ? {
+    http-redirect = {
+      port     = 80
+      protocol = "HTTP"
+      redirect = {
+        port        = "443"
+        protocol    = "HTTPS"
+        status_code = "HTTP_301"
+      }
+    }
+  } : {}
+
+  effective_listeners = merge(local.http_redirect_listener, var.listeners)
+}
+
+module "alb" {
+  source  = "terraform-aws-modules/alb/aws"
+  version = "10.5.0"
+
+  create = module.this.enabled
+
+  name               = module.this.id
+  load_balancer_type = var.load_balancer_type
+  internal           = var.internal
+  vpc_id             = var.vpc_id
+  subnets            = var.subnets
+
+  # ----------------------------------------------------------------
+  # Security baseline — drop_invalid_header_fields is hardcoded.
+  # enable_deletion_protection defaults to true; callers may set it to
+  # false for non-production environments.
+  # drop_invalid_header_fields is ALB-only; pass null for NLB so
+  # the upstream module does not error.
+  # ----------------------------------------------------------------
+  enable_deletion_protection = var.enable_deletion_protection
+  drop_invalid_header_fields = var.load_balancer_type == "application" ? true : null
+
+  # ----------------------------------------------------------------
+  # Security group rules — caller-supplied so both ALB (HTTP+HTTPS)
+  # and NLB (TCP) patterns are supported.
+  # ----------------------------------------------------------------
+  security_group_ingress_rules = var.security_group_ingress_rules
+  security_group_egress_rules  = var.security_group_egress_rules
+
+  # ----------------------------------------------------------------
+  # Access logging to a caller-supplied S3 bucket.
+  # ----------------------------------------------------------------
+  access_logs = var.access_logs
+
+  # ----------------------------------------------------------------
+  # Listeners — merged with the automatic HTTP→HTTPS redirect (ALB only).
+  # Target groups are passed through as-is.
+  # ----------------------------------------------------------------
+  listeners     = local.effective_listeners
+  target_groups = var.target_groups
+
+  # ----------------------------------------------------------------
+  # WAF association — optional, ALB only.
+  # ----------------------------------------------------------------
+  associate_web_acl = var.web_acl_arn != null
+  web_acl_arn       = var.web_acl_arn
+
+  # ----------------------------------------------------------------
+  # Tags — automatically populated from context.
+  # ----------------------------------------------------------------
+  tags = module.this.tags
+}
diff --git a/infrastructure/modules/alb/outputs.tf b/infrastructure/modules/alb/outputs.tf
new file mode 100644
index 0000000..6a659a9
--- /dev/null
+++ b/infrastructure/modules/alb/outputs.tf
@@ -0,0 +1,44 @@
+output "arn" {
+  description = "ARN of the load balancer. Used by WAF to associate a Web ACL."
+  value       = module.alb.arn
+}
+
+output "dns_name" {
+  description = "DNS name of the load balancer. Used by Route53 alias records."
+  value       = module.alb.dns_name
+}
+
+output "zone_id" {
+  description = "Hosted zone ID of the load balancer. Used by Route53 alias records."
+  value       = module.alb.zone_id
+}
+
+output "id" {
+  description = "ID of the load balancer (same as ARN)."
+  value       = module.alb.id
+}
+
+output "arn_suffix" {
+  description = "ARN suffix of the load balancer. Used with CloudWatch metrics."
+  value       = module.alb.arn_suffix
+}
+
+output "listeners" {
+  description = "Map of listeners created and their attributes. ECS tasks use this for depends_on."
+  value       = module.alb.listeners
+}
+
+output "target_groups" {
+  description = "Map of target groups created and their attributes. ECS tasks reference target_group ARNs from here."
+  value       = module.alb.target_groups
+}
+
+output "security_group_id" {
+  description = "ID of the security group created for the load balancer."
+  value       = module.alb.security_group_id
+}
+
+output "security_group_arn" {
+  description = "ARN of the security group created for the load balancer."
+  value       = module.alb.security_group_arn
+}
diff --git a/infrastructure/modules/alb/variables.tf b/infrastructure/modules/alb/variables.tf
new file mode 100644
index 0000000..a823e7e
--- /dev/null
+++ b/infrastructure/modules/alb/variables.tf
@@ -0,0 +1,122 @@
+################################################################
+# ALB/NLB-specific inputs.
+#
+# Naming, tagging and the master `enabled` switch come from
+# context.tf via `module.this`.
+#
+# Inputs intentionally NOT exposed (hardcoded in main.tf):
+#   - enable_deletion_protection → always true
+#   - drop_invalid_header_fields → always true for ALB
+################################################################
+
+variable "load_balancer_type" {
+  type        = string
+  default     = "application"
+  description = "Type of load balancer to create. Either 'application' (ALB) or 'network' (NLB)."
+
+  validation {
+    condition     = contains(["application", "network"], var.load_balancer_type)
+    error_message = "load_balancer_type must be 'application' or 'network'."
+  }
+}
+
+variable "internal" {
+  type        = bool
+  default     = false
+  description = "When true, the load balancer is internal (private). When false, it is internet-facing. Defaults to false."
+}
+
+variable "subnets" {
+  type        = list(string)
+  description = "List of subnet IDs to attach to the load balancer. For internet-facing ALBs, use public subnets."
+}
+
+variable "vpc_id" {
+  type        = string
+  description = "ID of the VPC in which the load balancer security group will be created."
+}
+
+variable "security_group_ingress_rules" {
+  type        = any
+  default     = {}
+  description = <<-EOT
+    Map of ingress rules to add to the load balancer security group.
+    Each key is a logical name; each value is an object describing the rule.
+    Example:
+      security_group_ingress_rules = {
+        https = {
+          from_port   = 443
+          to_port     = 443
+          ip_protocol = "tcp"
+          description = "HTTPS from internet"
+          cidr_ipv4   = "0.0.0.0/0"
+        }
+      }
+  EOT
+}
+
+variable "security_group_egress_rules" {
+  type        = any
+  default     = {}
+  description = <<-EOT
+    Map of egress rules to add to the load balancer security group.
+    Example:
+      security_group_egress_rules = {
+        https_out = {
+          from_port   = 443
+          to_port     = 443
+          ip_protocol = "tcp"
+          cidr_ipv4   = "0.0.0.0/0"
+        }
+      }
+  EOT
+}
+
+variable "access_logs" {
+  type = object({
+    bucket  = string
+    prefix  = optional(string)
+    enabled = optional(bool, true)
+  })
+  default     = null
+  description = "S3 access log delivery configuration. When null, access logging is disabled."
+}
+
+variable "listeners" {
+  type        = any
+  default     = {}
+  description = <<-EOT
+    Map of listener configurations to create. Passed directly to the upstream module.
+    For ALB, define HTTPS and HTTP listeners here. For NLB, define TCP/TLS listeners.
+    See https://registry.terraform.io/modules/terraform-aws-modules/alb/aws/latest
+    for full schema documentation.
+  EOT
+}
+
+variable "target_groups" {
+  type        = any
+  default     = {}
+  description = <<-EOT
+    Map of target group configurations to create. Passed directly to the upstream module.
+    See https://registry.terraform.io/modules/terraform-aws-modules/alb/aws/latest
+    for full schema documentation.
+  EOT
+}
+
+variable "web_acl_arn" {
+  type        = string
+  default     = null
+  description = "ARN of a WAFv2 Web ACL to associate with the load balancer. Only valid for ALB. When null, no WAF association is created."
+}
+
+variable "enable_deletion_protection" {
+  type        = bool
+  default     = true
+  description = "When true, deletion protection is enabled on the load balancer. Set to false for non-production environments where the load balancer needs to be freely destroyed."
+}
+
+variable "enable_http_https_redirect" {
+  type        = bool
+  default     = true
+  description = "When true, automatically adds a port-80 HTTP-to-HTTPS (301) redirect listener. Only applies when load_balancer_type is 'application'. Set to false if you are defining your own HTTP listener or the ALB is not serving HTTPS traffic."
+}
diff --git a/infrastructure/modules/alb/versions.tf b/infrastructure/modules/alb/versions.tf
new file mode 100644
index 0000000..cb30fe5
--- /dev/null
+++ b/infrastructure/modules/alb/versions.tf
@@ -0,0 +1,10 @@
+terraform {
+  required_version = ">= 1.13"
+
+  required_providers {
+    aws = {
+      source  = "hashicorp/aws"
+      version = ">= 6.42"
+    }
+  }
+}