Eyeculture were mentioned earlier in the thread. Haven't used them myself but have heard good things about them.
Mohiuddin Siddique
57,Fashion Street
London
E1 6PX
UK
I use a place on Leyton High, which is ok, not that great. There is a place on Romford Rd that I'm going to check out. It depends on where you are in London I guess.
+1 muhhfuckr !!
mohi is my man