Hi Ada,
I live in the UK but I totally understand what you mean, it is the same UK.

In my school we can wear black trainers but we can't have any other colour on them.

We can't sing Baa Baa Black Sheep to young children because it is racist to Africans etc.

Boys can colour their hair but girls can't

Girls can only wear bobbles/headbands etc that are green, black or white, to represent our schools uniform

Boys can't wear tracksuit bottoms

Girls can't wear skirts

It is just stupid
Pain free hugs
Alison