Oxfordshire Riding school (for 5 yr old)

[TessDurbeyfield]

I'd be really grateful if anyone could recommend any good riding schools in Oxfordshire (nearish to Oxford but don't mind driving a bit).
DD is about to turn 5 and I'd like to take her for a ride for her birthday with the possibility of lessons in the future if she likes it (I guess she is slightly young to be starting regular lessons?)
I used to ride a lot as a teenager but am very out of practice and would love to take some adult lessons too if there are any recommendations for (very) rusty adults.

Many thanks