Sorry, I meant to get back to you on this before. In case you haven't already contacted the BWA, I don't think there's anything close to you. According to the 2011/2012 breeders list, they have six breeders listed in Cornwall, Kent, Lincoln, Shropshire and two in Suffolk. I can send you the contact details of the more northerly ones if you want because they might know of somebody who keeps them further North (and even if they're not officially a breeder they might be able to sell you a couple). I'm guessing it's quite a small world (certainly the West of England seems to be) so it's probably worth calling somebody to see whether they can help. I can PM you details of the Southern Scottish BWA contact as well if you want - best not put his details on here in case he gets bombarded with internet crap.
H