Righto, so I'll give you a shout when I get back to London and come to meet you wherever you are near London Bridge. I shouldn't be too late.
As for what to bring, I do have a 1080p TV but I don't have any consoles. Just a trusty old GeForce 7600GT PC with a few multiplayer games and co-ops installed on it.
For sleeping arrangements, there is a spare double room, a double inflatable mattress, a three seater and a two seater. So I think we're covered there already. Would advise bringing own toothbrush as wife doesn't like sharing. If someone really wants to go in a tent, there is a lawn.
Might be a good idea to bring a towel.
Supermarket and other shops are well (WELL!) within walking distance, so I wouldn't worry about bringing too much alcohol with you. Ditto food.
My parents don't turn up until late-ish Sunday, so crashing Saturday night is also welcome (unless you've vomitted on the carpet, making the colour even worse!)
No wanking in the shower.