Cranfield is a busy training drome, I've seen a lot of "interesting" things happen but two RT calls come to mind from last summer.
Tower: "G-XX you have been ignoring my calls, permission to land is denied, get out of my circuit"
And whilst being no 1. on hold - a sudden flurry of "extend base", "overhsoot" and me to stop calls as a Cessna popped up over the fence and landed on the active. The tower called G-XX (a known airfield training plane) and asked for the instructor while the C-150 rolled out. "Do you want to tell your pupil what he did wrong or would you like me to?" I'd love ot have heard the rest of the conversation.