Just out of curiosity more than anything else I wondered how our DDs dress for school. For example my own DD in year 6, going on 11, now wants to wear trousers more often now that the cold weather is here. She only ever wore skirts and dresses until year 5, when she wore trousers in snow, freezing cold days etc. I'm not against it, trousers are smart enough, though I could never have at primary school in the 70s. Also she always wears poloshirts, never the shirt and tie the school provide, except formal events (where girls must wear shirt, tie, skirt, tights). And blazers don't exist anymore.
How does this match with your DDs? Does your school dictate some of those options or do you have free choice?