Printer/Jack
The sire's line goes back to the Rillington dogs and in particular Georges dog Nimrod. I guess there is a bit of something else in there, but whatever it is he looked the right sort, getting on in years a bit but had obviously seen a bit of action .
I got my pup from a farm on the North Wales/Shropshire area if that fills in any spaces for you.
Looking at some of your pics Printer , I can see the resemblance in type, (head like a 30 bob cabbage as my dad used to say).
When I bought him I was tempted into taking two pups and also had my eye on a tiny blue bitch p