I read a series of pony stores as child in 1991 ish from the school library and cannot for the life of me work out what they are. I reckon they were written in 60/70s
Child gets pony with her dads redundancy money
Mother is dead??
They live in one of two isolated cottages
They did a musical ride
They went on a long overnight trek (they bang their heads in the pillow so they knew when to get up)
I don't think it's pullein Thompson or Ruby Ferguson unless it is a different series?