Rob, as you have your doubts about this Hobs working abilty, and you have given him lots of chances, then i would get rid, as you say your happy with your jill, then I would find who has good working ferrets in your area, and if breeding, then you can either go for another jill or hob,
Regarding a good working bedlington, The Working Bedlington Forum is the place to look, and coming from Wales theres a few Welsh lads on there who are working them,