The school has gone now, and I'm sure it was down to the headmistress saying that if the system of 11 plus ever stopped she wouldn't teach the riff raff !! That destroyed my idea of what nuns were like, but she obviously did.
I was a day pupil at the convent, and I found it very oppressive, very sort of old worldly, it was always quiet. We weren't allowed to run or shout, and had to wear plimsolls inside the school
and walk against the wall on the left.
The nuns were like tyrants and we didn't dare to question them. The most scary thing used to happen during assembly where if you dared to speak during prayers the headmistress would come down from the stage and walk along one line until she came to the pupil she had seen talking and slap them across the face.