School uniform kilts

I often find that of I write something down, then an answer forms in my mind. These 'kilts' do seem to be uniform - in that each school has its own tartan (does anyone know if they're supposed to register it?) but I don't see them generally available.
Are they more expensive than standard grey / black skirts or trousers - which would make the school a bit more exclusive?
It also amuses me that those of you who have mentioned them, say no pins ( a sharp object!). Does anyone who knows about them know if the boys can wear kilts? I thought they were traditional male attire.

All the senior schools near us, three, have moved to plaid skirts, they’re not kilts with pins, I don’t know why, they look smart though.

We have three schools here where the girls wear kilt style skirts. The schools are part of an academy. I like them, such a change from the dreary navy and black. I think they look to be of good quality too.

Is that Gresham’s School Primrose? The girls look very smart in their kilts.

Where I used to live there was a comprehensive which required the girls to wear kilts or trousers. The girls used to roll the tops of the skirts over (as we did in the 60s!) and didn’t look nearly so good.

Girls will always find a way of bending the rules on skirts if they can, wether kilts of not. There is a private girls school nearby that has calf length skirts I don’t remember seeing trousers either, very strict uniform code.

My DD'ss wore grey kilts at secondary school until year 10 with a grey blazer. It had previously been a boy's school who's uniform was a grey suit. I think the idea about the kilt was to make ladies of them, they could not fool around or they gapped and they were not allowed to put a pin in.
Frinds D's wore tartan skirt kilts, they were all Independent schools.
Thinking back I always wore kilts at Infant and Junior school and they were not the family tartan of which my mother would have had a choice,Stewart being the main.
Maybe the reason is the same as my daughters you can not fool around or personalise them.

Two schools

I can’t enlighten you as to why schools choose tartan just to say there are at least schools near me where the girls wear tartan skirts/kilts one is brown mix and the other one red.

There’s a posh public school near here and the girls have always worn long tartan kilts in winter. They are very long and cannot be rolled over into mini skirts. I like to see them actually.

I think some state schools are copying them but they are of inferior quality and of much thinner material so they can be turned over at the waist and worn much shorter.