My brother has a litter of GSP x WHV pups.
The mother is a GSP, pet but certainly has potential to work, she is black and I think quite small for the breed.
The father is a WHV, fairly big dog and does work although I haven't seen him in action.
Only dog pups available, born 1/2/15.
I will get pics, once they are old enough to look like a dog rather than a mole.
Ideally, he wants £500 [although I'm sure there will be room for negotiation]