Yes I used to use him. He was very good but generally has a fairly long wait period so you have to book a couple of months in advance....or at least you used to.
Colin is great. He also only requires horses to be doped if they really really need it (and I hear that is quite rare amongst Equine Dentists). We never have any problems getting hold of him, but then we've known and used him for years and he does the whole yard, so there may well be a wait for new customers with only one or two horses.