Twenty years ago used to work in a big office near a police station and he police used to hire people from our office to go on identity parades. We used to get �10 each twenty years ago- so maybe it's �20 at least now. One day 11 of us turned up in nice suits and the alleged mugger came in dressed in really scruffy clothes. I never understood why his solicitor didn't challenge the composition of the parade- all he did was ask us to take our ties off. Needless to say the alleged mugger was picked out by the victim.
Anyway, I'm sure a web search on police sites would throw up info