She is fine. I'm a mess!
Pony was cantering and bucked her off as he was spooked. She was wearing her body protector and was winded but not really hurt, just shocked. Very pale. When she got her breath back she got back on and had a walk about.
I think we both realised the danger and it was scary. She's absolutely fine now and has had a bath and a hot chocolate at home. I know nothing about horses but the riding school instructors are fab. She's been checked over. I'm shattered now!