Vile purple polyester blazers were the order of the day at my secondary - Nasty, scratchy things that would go all shiny at the elbows by October half term. Tie wearing was vigorously policed - not too short, not too long and definitely no “big” knots. You’d also get a bollocking if you were the hapless recipient of a “peanut” (which, given that this was a popular form of low-level bullying, seemed a little unfair).
Shirts could either be white or grey. A grey shirt, however, immediately singled-out the wearer as a “gypo”, and thus were not a popular option.
Sixth Form was exactly the same, but with a slightly different tie. The upper part of our school used to be a grammar school and some of the teachers clung to the vestiges of that by wearing gowns. It was helpful to the new starter that these teachers were easily identifiable as they were, to a man and woman, utter cunts.