Nancy at St Brides is odd because it was written after the others. The first Nancy book in publication order is That Boarding School Girl in which Nancy lands at a day grammar school after being expelled from St Brides and having vowed never to tell anyone there what happened at St Brides, which causes noble complications of schoolgirl honour. Then later on Bruce went back and wrote Nancy at St Brides, possibly because she had run out of things for Nancy to do by the time she'd grown up and become a professional organist. So it's not typical of the Nancy series as mostly they are day school stories set in England. That doesn't mean they're not good - there are feuds between the rival day schools whose juniors fight in the streets on their way home - but you might be surprised if you find another one and it isn't anything like Nancy at St Brides.

Bruce's Springdale series is set in a boarding school in Scotland, and the Dimsies are boarding school on the English south coast (with secret tunnels).

I have nearly all of Bruce's books if you would ever like to borrow. My username comes from the Dimsies.