I found a brand new UK survival server that is mainly here for stress testing and performance checks. The owner is mixing Azure hosting with Minecraft and wants players to jump in and see how it feels.
It runs on Paper 1.21 and the gamemode is Survival. The server is hosted in the UK on Azure UK South so it should feel snappy for UK players.
If you join the test server you are basically helping them push the infrastructure and report if anything feels laggy or weird. They also offer free 48 hour server trials for anyone who wants to try running their own server.
