Exactly - services on GOV.UK are developed by teams across government (as well as agencies etc), and they're (mostly) free to use whatever tech makes sense for

Exactly - services on GOV.UK are developed by teams across government (as well as agencies etc), and they're (mostly) free to use whatever tech makes sense for the team and the project. GOV.UK Vue isn't intended for normal, bread-and-butter transactional services (usually a series of form pages) but for things like more complex internal tools, dashboards, mapping etc which would be using JS to provide interactivity