Stolen bikes

+1 abus do locks from about £2 to £100+ motorbike locks.

I think tbh if your in london and your bike could be worth more than £100 then you have to spend nearly that on a lock (£65), or pretty much its a time bomb until it does go :/

This.

Since having a bike stolen (thankfully my first rubbish bike I had in London) my thinking is make it more difficult to steal than someone else's. Fahg + Mini Evo/Cable depending on where I am going or what I am doing.

Ball bearings glued in everything etc