I'm based in Turnpike Lane and know a few good places to go. The best place by far i've found to watch footy in London is the Famous 3 Kings in West Kensington, can be a bit of a trek, especially for those of us based in the North but this place is quality. It shows all Saturday games (and i mean all), is huge, serves food and shows basically any sport on so there's always a good atmosphere in there. If you give them a bell (02076036071) they can give you info on what's on and you can request stuff to be put on. Always seems quite a few villa in there when we're on. Great place to spend a Saturday.
http://www.sportspubs.co.uk/new_detail.php?pubscode=161
There also used to be a London Villans page on Facebook as well, not sure if that's still about. If not we should certainly sort something out down here.