jefmcg
Guru
In case anyone stumbles on this thread, @vickster bought the abus lock and didn't get on with it at all. She's replaced it with this one, functionally about the same but v cheap and ridiculously tiny.vote for cafe lock. There will be lots of bikes unprotected, so any lock will do. using this principle ....
I've got this one http://www.wiggle.co.uk/abus-combiflex-202-90cm-cable-bike-lock/ though allegedly they have problems with seizing up, I'm very happy with it and it's small and light.
(personally would not enjoy wearing a hiplock for further than commuting distance)