Bedtime wasn't rigidly at 7pm. It gradually gets older as kids grow older. That's what happened when I was I was a child and it's how we raised our daughters.
Uniforms are also (as well as preventing catwalk culture in schools), useful for identifying which school a child attends. So if there are hundreds of kids running round together, on school trips, for example, they can all be identified. at a glance and counted by the teachers.
An aside re. the use of language in front of the kids. My ex-wife was driving my then four year old step daughter sitting sweetly in her seat watching the world go by, when some fool pulled out in front of her car causing her to brake suddenly. A little voice from the back of the car chimed in "Dipstick!". The kids not only pick up the words but the right context in which to use them - often to hilarious effect, when least expected.
I was travelling to school by public transport (steam-hauled train after a 3/4 mile walk to the station) from the age of 11 back in 1951. I'd been travelling on public transport adult-free for some years already. It wasn't unusual.
I'm 80 years old and went to secondary school in the UK in the 1950's, it meant crossing a busy main road at a three way junction and after a pupil had a near miss with a car they decided to use a crossing patrol. The pupils aged 12 to 15 deided this was demeaning and so the majority crossed before we arrived at the crossing and despite pleas from the teachers most continued to do so. It lasted one term and the pupils won, no more wrapping us in cotton wool, most of the parents backed us and there was never an accident there. We were trusted to act responsibility crossing busy road's from an early age, we were taught road drill at age 5, Stand by Edge of Kerb, Look Left, Look Right then Look Left again, If all clear Cross. A few years later it was modified to the Green Cross Code shown on TV adverts with Green Cross Man, far too contrasending for British Kids. Very few people took kids to a pub meal, maybe to a restaurant with a bar. Pubs are fast becoming a thing of the past, despite the population of Towns and Villiages becoming larger the amount of pubs in the area are declining. In the Villiage I live in there were 7 pubs in the 1950's now despite 3 large housing estates being built only 2 are left.
My son went to Christ's Hospital. They still wear the same 16th century uniform. Every few years they have a school referendum on the uniform and 95% or more of the students vote to keep it.
A stroller is a pushchair not a pram. A pram is available to buy but as they rarely fit into cars, trains or buses, they are kept in gardens and for walks to the park.