Dark grey trousers, dark brown shoes, black long sleeved or short sleeved button down collared shirt with our own names and boundless photos stitched on the the front.
Cant imagine wearing a tie and defintely not a jacket, I am just about at melting point anyway with carrying gear, up and down ladders, laid on the floor, moving to get in front or behind people for shots ..... we had a bridesmaid feint in a church 1 week ago and if I had been forced to wear a jacket and tie I reckon I would been on the floor before her!