If you go the the FRC website you can put your postcode in to find one near you. We aren't too far from you however I do know that the farrier that we use isn't taking on any new customers at the mo. Good luck though!
Scrap that I didn't, it won't allow me. Website is http://www.mjfarriers.com they should cover your area. I've only ever used Mike but he was brilliant and I know he wouldn't hire anyone who was less than fantastic. He was the only farrier who could previously get shoes to stay on my TB and was very patient with him.
the need to change? go to farrier reg website all listed. Had that job to do last year im in that area too and all the farriers are soo busy most of the ones taking on new clients aren't that great so try and get one by word of mouth. gd luck