How old / big is she, DODx?
Our next door neighbours (nr Stirling) have a lovely horse for sale at the moment (he belongs to their daughter, but she doesn't have the time to ride him any more now she's working).
He's a thoroughbred ex-racehorse, and jumps really well. We have a mutual friend who knows about horses and says he's the nicest one he's ever worked with - not an ounce of badness in him.
I don't know a thing about horses, except that they bite at one end and kick at the other. However, obviously they do, and could give you a better steer on whether he'd be suitable or not. PM me your Email address if you want me to get you more details.