Agreed. When my series 2 started acting up, I dropped some chain oil (since I was at school and had nothing else) and put pressure on the key in the lock while wiggling it around in a conical direction in the barrel. While the lock doesn't reliably open, the conical wiggling gets it open every time it acts up.

Does kryptonite send out new locks in the UK? I love my series 2, and unless someone knows of another high quality, long d-lock with gold security rating (for the bike insurance) whilst still being relatively inexpensive, then I'd want another series 2

I also wrapped mine in old inner tube to make it less obvious to the world and to protect the paintwork on my bike, or what's left of it, anyway.