The book I'm currently working on, "Intertwined", is set in and around South Wales. It also inevitably involves the police. So, this week, armed with a load of questions about procedures and call-signs, I sat down with a retired police officer and had a very interesting chat about all the more mundane details that I'd need to know to help make my character more realistic, and the story more believable.
So, now I know my PC from my DC, the CSI from the ARV, and we had a very enjoyable, and absorbing afternoon. Thanks Colin!