I like the idea of sending them a letter and a cheque for £10 requesting all CCTV footage with you in it. They will have to supply it and some poor sod will have to sit there, not only to firstly identify you, but to also block out the faces of everyone else in the footage. Cost them far more than a tenners worth of time.
Dontcha just love Freedom of information and data protection? lol.

Alex.