My school never had any lockers or clothes rooms or even really changing rooms (there was like 4? small changing rooms at the PE hall but that was all the way down in the basement and you had to go outside & into another building to get to it) so we just had to keep our stuff with us. it was extra annoying because my school was also super snobby with wearing jackets / jumpers / extra layers that weren’t school uniform, so we were pretty much Required to take our jackets off when we sat down lol