
Hopefully someone with more specific advice will see your post.
But I'm positive that a CD member recently gave some information on a specialist vet in north somerset - so not far from Bristol.
The hurrier I go - the behinder I get!
Look up Fit and Fertile. They're in Preston (I believe) near Liverpool. They have been really helpful with my enquiries when I was considering importing semen. There's another one called CLONE (not meaning Cloning) which have also been extremely helpful if you search for that as well.
Edited to add - the CLONE one might be closer for you - I think they are based near 3 counties.
Hope this helps
Most dogs have owners. Mine have SERVANTS!