Personally I only carry a mini kryptonite, and secure rear wheel and frame. Pitlock on front wheel. Ultimately front wheels are much less hassle to replace than rear (tenuous point but I seem to have a lot of front wheels).
I live in Hackney and to date nothing has been nicked off any of my bikes.
As usual, Sheldon speaks a lot of sense http://www.sheldonbrown.com/lock-strategy.html
Personally I only carry a mini kryptonite, and secure rear wheel and frame. Pitlock on front wheel. Ultimately front wheels are much less hassle to replace than rear (tenuous point but I seem to have a lot of front wheels).
I live in Hackney and to date nothing has been nicked off any of my bikes.