Sorry, famous, I am back on my home computer now.
Different forces have different policies on this but chuckfickens answer is basically what happens although some of the lazy police facres are full of lazy bureacrats that produce lots of forms for this sort of thing.
If you require any info on these sort of things search the Net for ACPO policies (or should I say ACPO Ltd / Plc ) The Association of Chief Police Officers site -
http://www.acpo.police.uk/