Not sure if this entirely helps but this sausagemaker uses rare breed pork from West Yorkshire and in the review it says they detail the local farms they get their pork from:
http://www.sausagelinks.co.uk/producer_detail.asp?id=73Dave
Edit: elsewhere produces this on the same place:
Lishmans of Ilkley - Speciality
23-27 LKeeds Road, Ilkley, Yorkshire W , lS29 8DP
Contact : David Lishman on 01943 609436
Email :
david@lishmans.fsbusiness.co.uk Details:
High quality butcher and fine foods and national champion sausage maker in 1999 & 2001 using rare breed pork produced on our own farm.