I used to wear a tie to fly at Cosford with the Wrekin, but only during the working week, if I could sneak a tow while UBAS stopped for lunch. I got pulled up the Stn Cdr following such a trip when I wandered into the Mess looking a bit rumpled after 4 hours wandering round the skies of Shropshire in my woolly pully. I think my reply was to the effect that a long time in a parachute harness tended to do that to one’s uniform.