Love love love this thread - so many memories and books I’d forgotten about!
St Clare’s and Mallory Towers
Also some lesser-known Blyton books (I remember Mr Galliano’s circus... also the Put-em-Rights and a series about a family who moved from the city to a farm... can only remember that they had a cook called Dorcas and one of the children was called Roderick, I think!) And the Valley of Adventure, Mountain of Adventure etc series, with Lucy-Ann at some other characters whose names I can’t remember.
Bogwoppit! - loved this, think my Dd would too
A little Princess - read until the cover fell off
The Diddakoi, Miss Happiness and Miss Flower and Little Plum by Rumer Godden
The Antonia Forrest books
What Katy Did and the sequels
The Little House on the Prairie books
Also Mandy by Julie Edwards as a PP mentioned
Charley and When Marnie was There by Joan G Robinson
An early Jacqueline Wilson book called The Other Side, about a girl whose mum has a nervous breakdown
And my absolute favourite - has anyone else read The Bewitching of Alison Albright by AD Langholm? Read this over and over again.