Well she is freelance and comes to my yard, is a HT specialist so does flat work and jumping, not sure of any yards as such that do lessons on their horses if thats what your after
I'm more Farnham area and i dont have lessons anymore but when i was at riding schools I rode at Old park ( now moved to chobham ) , The riding centre at Old park lane , Farnham castle ( no longer a riding school ) . And when i share horses most of the yard usually offer lessons with their instructor ( usually another livery)
Sorry not much help
If you're looking for a riding school then my partner's daughters ride at Willow Farm Stud near Chobham. It's well run and they've learned very quickly.
I have a freelance instructor who comes to the yard, she's based in Frimley and travels over to the Guildford area regularly. She trained at Waterstock and is very good, but not cheap! PM me if you want details.