<<And one final question whilst I think about it, are any of the other large public spectator events as busy with rotary operations - Cowes, Henley Regatta, Cheltenham Gold Cup etc etc. Ive experienced the GP first hand but not the others.>>
Epsom and Ascot for racing are extremely busy. The ATC at these and other such events used to be run by a guy I worked with at West Drayton but I believe he has retired.