I had the opportunity to work with GDS on a project. These folks have a startup mentality and are the polar opposite of what one imagines a governmental office to be.
One thing that will always stick with me is one of the team leads telling me "we don't have customers, we have users" -- i.e. in the UK everyone has use Gov.uk for government-related digital information/tools/services. There's no competitor, therefore no customer choice. And they are well aware of this, hence their obsessions for the UX.
I really wish other governmental digital agencies had this same mindset.