Skip to main content

Application: collections

Serves GOV.UK navigation pages, browse, topic, step-by-steps & services and information pages.

Example pages rendered by collections


Collections serves the GOV.UK navigation pages and organisation pages. Search API is used to make the pages dynamic e.g. the latest changes for Topics, Organisations and Mainstream browse pages.

At time of writing, it also serves the priority campaign pages. See the Campaign pages manual for more details.

Live examples



  • Curated list: a group of content tagged to a subtopic that has been curated into a named list.
  • Topic: a named group of sub-topics. (A deprecated name for this is “specialist sector”.)
  • Sub-topic: a group of content within a topic. (A deprecated name for this is “specialist sub-sector”.)

Technical documentation

This is a Ruby on Rails app, and should follow our Rails app conventions.

You can use the GOV.UK Docker environment or the local script to run the app. Read the guidance on local frontend development to find out more about each approach, before you get started.

If you are using GOV.UK Docker, remember to combine it with the commands that follow. See the GOV.UK Docker usage instructions for examples.

Running the test suite

bundle exec rake

To test a single file:

bundle exec rails test test/unit/application_helper_test.rb

To run JavaScript tests (only):

bundle exec rake jasmine

Pact tests

Collections Organisations API has a pact with GDS API Adapters.

See the guidance on Pact testing for how to run and modify the tests.

Further documentation


MIT License