Stolen bikes

I only went to grab a coffee with a mate, probb only 200M away from the bike the whole time. Chatted to one of the Police Cycle task guys at the bike show about those seat locks. But think I may just do what I used to do, NEVER leave my bike! London has to be the worst city for this.

Another genuine question, do you not have another bike for going around London? I have two bikes, one is my decent road bike that I spend quite some time puting together that I ride out in the countryside, and the other is a cheap OTP fixed wheel bicycles that I used for everything else (training, commuting, hopefully cyclocross etc.).

pitlocking and decent locking method should able to deterred thieves, but not completely with a De Rosa equipped with campag I'm afraid.