If you are ever in the City of London and fancy a game then you could do far worse than check out the Porter's Lodge:
[You must be registered and logged in to see this link.]Great place with 8 or 9 boards, so chances are you will be able to get on one of them - don't think they have a kitchen for food though so you will have to eat elsewhere lol.
If you do get down there any time during the week, let me know and I'll try and come down as well if I am around and don't have a match.
Also, they are sponsored by Red Dragon and also sell some darting goods on site.