Quoting: peterweg
I expect they will give the IP address to the UK Police if asked. We do have reciprocating laws after all.
Even if they did, which I doubt, i don't think anything would happen apart from it being filled under B and never seen again.
Seriously, I was talking to a mate of mine last week and he said he was watching some little scroat breaking into his car and proceeding to reverse engineer the stereo system. (obviously some kind of YTS initiative)
He naturally called the police who gallantly turned up a few hours later and told him to forget it, no chance of finding the little darling etc and as a parthian shot (as he'd asked what had taken so long) they told him that they only responded quickly if it was violence or drugs related.