Vicki is great at Hooky. But I have to say I would use Bourton Vale if you can. Although they are a fair distance away. They are superb IMO. It depends which side of Banbury you are as to wether they will come out to you. They are purely equine vets.
Hope this helps.
thanks everyone for your help. I called for quotes this morning but then the seller (who had accepted my offer yesterday) called and said the horse was now sold to someone else. I am absolutely gutted and it looks like I won't be needing a vet near Banbury after all