diff --git a/specification/record-locator/producer.yaml b/specification/record-locator/producer.yaml
index 6725a84..771baa0 100644
--- a/specification/record-locator/producer.yaml
+++ b/specification/record-locator/producer.yaml
@@ -123,6 +123,32 @@ info:
 
     * [Application-restricted RESTful API - signed JWT authentication](https://digital.nhs.uk/developer/guides-and-documentation/security-and-authorisation/application-restricted-restful-apis-signed-jwt-authentication)
 
+    ## Errors
+
+    We use standard HTTP status codes to show whether an API request succeeded or not. They are usually in the range:
+
+    * 200 to 299 if it succeeded, including code 202 if it was accepted by an API that needs to wait for further action
+    * 400 to 499 if it failed because of a client error by your application
+    * 500 to 599 if it failed because of an error on our server
+
+    Errors specific to each API are shown in the Endpoints section, under Response. See our [reference guide](https://digital.nhs.uk/developer/guides-and-documentation/reference-guide#http-status-codes) for more on errors.
+
+    ## Open source
+
+    You might find the following open source resources useful:
+
+    | Resource                  | Description                                               | Links                                                             |
+    |---------------------------|-----------------------------------------------------------|-------------------------------------------------------------------|
+    | NRL v3 API                | Source code for the core API and sandbox                  | [GitHub repo](https://github.com/NHSDigital/nrlf)                 |
+    | NRL v3 Producer API       | Source code for the producer API proxy and specification. | [GitHub repo](https://github.com/NHSDigital/nrl-producer-api)     |
+    | NRL v3 Consumer API       | Source code for the consumer API proxy and specification. | [GitHub repo](https://github.com/NHSDigital/nrl-consumer-api)     |
+    | Lambda Pipeline Package   | Source code for the lambda pipeline utility               | [GitHub repo](https://github.com/NHSDigital/nrlf-lambda-pipeline) |
+    | Lambda Logging Package    | Source code for the lambda logging utility                | [GitHub repo](https://github.com/NHSDigital/nrlf-lambda-logging)  |
+
+    We currently don't have any open source client libraries or sample code for this API. If you think this would be useful, you can [upvote the suggestion on our Interactive Product Backlog](https://nhs-digital-api-management.featureupvote.com/suggestions/107439/client-libraries-and-reference-implementations).
+
+    The source code for the PDS FHIR back end (the Core Spine source code) is not currently in the open. If you think this would be useful, you can [upvote the suggestion on our Interactive Product Backlog](https://nhs-digital-api-management.featureupvote.com/suggestions/466692/open-source-core-spine-including-pds-eps-scr-and-more).
+
     ## Environments and testing
 
     | Environment       | Base URL                                                               |
@@ -181,16 +207,6 @@ info:
         </div>
     </div>
 
-    ## Errors
-
-    We use standard HTTP status codes to show whether an API request succeeded or not. They are usually in the range:
-
-    * 200 to 299 if it succeeded, including code 202 if it was accepted by an API that needs to wait for further action
-    * 400 to 499 if it failed because of a client error by your application
-    * 500 to 599 if it failed because of an error on our server
-
-    Errors specific to each API are shown in the Endpoints section, under Response. See our [reference guide](https://digital.nhs.uk/developer/guides-and-documentation/reference-guide#http-status-codes) for more on errors.
-
     ## Change log
 
     For details of how this API has changed over time, see the [change log](https://github.com/NHSDigital/NRLF/blob/main/CHANGELOG.md).