My brother was working on the Exeter Chiefs ground a few yeas back... Big contractor on the job, he had to wear at all times, long trousers, shirt, hi viz, hard hat, gloves and goggles.. He was up on the roof in a real sun trap and it was red hot , ended up with heat exhaustion and was in a bad way for couple of days.. Site agents for big firms have no common sense at times..
The same as some of these head masters ( wearing a blazer Ffs Johnny, you should have put him in a dress lol)..,