This is the response I got from Mosquito Bikes (Islington). Not my "local" BS, but I just bought a new steed from there and they're top guys so I don't mind the trip to see them. Highly recommended
Also one of my mechanics would really like to fit it all and he works Monday, Tuesday, Thursday and Friday generally, although not next Monday so could you bring it to us on a day he can do it (he is a big fan of old bike stuff!)
Â£20. Worth the trek on the tube to get there and the run back. Except they've got racks of Indie Fabs, Moots .....