i'm an ACF officer, and have recently been made the county sports officer (along with a bunch of other stuff...this is supposed to be a HOBBY!) in the past when going to sports events i have worn what i THOUGHT was the correct rig, ie tweed jacket, cords (i don't own moleskins at the moment), county tie and a flat cap. i have seen senior officers at regional and national events wear this and i assumed it was de rigour. however, i get a bit of flack from my county HQ staff for dressing like a farmer! when i was at the factory back in the day we always wore a blazer (preferably the issue kevlar one). doesn't bother me too much as these are also the guys who insist that i can't wear barrack dress at county hq in the office because it's a "made up form of dress".