If anyone's ever in London and needing bike advice or product then I really recommend LBS in Notting Hill, run by a woman (Ninon), it's called Bike Fix I think. (Can't remember as I have been going there so long I just know where it is not where it's called. I think it's in St. Luke's road or near. They are very strong on repair and options for repair. She also has good knowledge on several other types of products that she will sell. It's a very traditional bike shop. Also Ninon will never sell you anything just because it's expensive - if she's not sure that sounds like what would be best for you, or if she has a different/cheaper suggestion, she always checks. Lastly she doesn't do that boy-biker patronising thing. I really recommend her. Of course if I am far from home I go to other LBS's in an emergency, but I always try to do most things with her first.