Can I recommend not getting any! Its a waste of time, money and precious patience.
In the beginning of the year the Fire Brigade 'helped' cut my mini-D lock off my beautiful Italian steel track frame. I had a top tube cover and after it feeling weird I ripped it off the next day to discover it was completely mangled from the hydraulic bolt cutters.
It has taken them THIS long to get back to me and ask for a letter from the Fire Brigade. After speaking to the Fire Brigade they cannot give me an incident number telephonically, deny they blatantly damaged my bike, and are referring my details to their legal team! All of this is with a witness statement and causing an epic scene outside the Foundry.
Any suggestions that don't involve automatic weapons! Arghhhhhhhhhhhh! Waaannnkkkkeeeeerrrrrrssssssssssssssssssss!