I’m connected though not a parent. What is it you want to know? To my knowledge it’s a pleasant environment with well above average general education and some very small class sizes from GCSE up. I would say only go there if your child is really passionate about music, most likely wanting to take it professionally. They live and breathe music. Hours a day. The assumption and culture there is you are highly likely heading for music conservatoire. For kids like that, it can be a dream because they go from being the isolated geek with a passion most don’t understand (in a normal school) to being surrounded by kindred spirits. The flip side is it’s highly competitive, because everyone is truly exceptional…. This spurs everybody on but can also make a kid feel bad…. Someone who might be celebrated in a mainstream school for having music skills and be a bit of a star at concerts. Can feel a swamped underdog, who never gets celebrated, at a place like Purcell.
Overall, as far as I’m aware, it’s a pleasant, nurturing environment.
Be aware also that classical music is by far the greatest focus there. They have popular music programmes that are growing, but if that’s your child’s thing, they will still be in the small minority.
Everybody has to do music a level and other subject choices are pretty narrow, as they don’t have the numbers to support too many choices, so that’s worth checking too. And relate to that, it’s a small school. This can make it very homely - like a family…. But if you don’t get on with your classmates, there’s not much room to hide/ find alternatives. due to the artistic bent, my impression is it’s pretty grungey and fluid about how the different sexes behave (ie walking around more likely to see girls free of make up, in dungarees, than dressed to the nines with identikit long hair and make up…… it’s probably less a place where physical supremacy/ being the jock etc rules).
Also very, very international - loads of students come there from other countries and across the uk, so would get tons of exposure to global mindset.