[dtquad]

Interesting that the majority of (new?) UK govt software development is by convention Ruby on Rails:

https://docs.publishing.service.gov.uk/manual/conventions-fo...

Are there other examples of governments mandating the use of specific technologies?

[mattlondon]

I think that is the gov.uk website, not any UK government software.

I think it is quite normal for individual sites to enforce a tech stack for their own site. gov.uk is quite huge - all sorts of things from passport applications, tax returns, car licensing and so on.