You could also check out the British Starfleet Corps. We have members from around the world but the majority are concentrated in the UK/EU area right now. We're a mature community here to have fun, we don't enforce play styles or times, and we do have our own Vent server. Our numbers are around the 65-70 mark at the moment, although there's a few people I still haven't got invites to yet because they haven't got into the headstart due to work and family commitments.
Anyway, if you'd like to know a bit more wander over to our recruitment topic as that should cover the basics. Anything else feel free to PM me.
Good luck finding what you're after and see you in STO some time!