I worked in Horrids one Christmas/New Year as a temp handyman. Got to know the in-store security quite well, and one day one of the girl store-detectives came up to me and asked me to watch a chap who they knew was running a shop-lifting team that was in the men's department that moment. I shuffled along pretending to check things, and then he started to move to an outside door. She signalled for me to stop him, so I chased him down Walton Street until I caught him and held him until Plod arrived.
He was out on license for armed robbery. No-one in Horrids thanked me apart from the security girl - go figure