DC1 ended up in school in a mixed year group due to an event just before Christmas.
The children involved were year 8 to 10 so 12 to 15. The teacher was aware of the kids ages.
Dc1 had been asking to watch a film and as it was three years above their age range I refused. They have seen 12s at 11 and stuff so I'm not a total fuddy duddy but I think it is entirely dependent on the film.
Anyway dc came home saying they had watched this film and I have just checked with another parent and it is true.