I couldn't see any others when I searched earlier (I tried the browse sites and searching - I may just be really bad at it or I guess there are some scaling issues with the recent influx of users, I'm getting a fair few timeouts and things).

I've no real desire to run a community so I'd be happier if there was an existing one. Fair point on the more general communities at this stage, I saw a couple pop up for other UK cities in the trending list so went looking for London and came up blank. It's not something I'm wanting to push at all, so I'll leave it as is and if people use it, that's ok, and if not, that's also ok.