I can't see much staff in him from the pictures, I do see a jack russell shape there but can't tell what he may be crossed with. The dog does seem to have queen ann legs at the front and I have seen a few poorly bred jack russels with legs the same.
I agree Jack Russell is in him comparing his pictures with other white jack Russell, a lot of people say he is cross jack Russell with staff. Here is a white jack Russell pictures i have found please compare.
I can't see any staff in him from the pics, but in the flesh he may look different, if you know what I mean. Whatever he is he is lovely bless him.
indeed it would be different in person, i have tried a few angles and will post them up shortly to help a few people to identify the breed, he is a rescue dog and nervous, i have posted a thread up about him under "aggressive stray dog" if your interested in reading.
I see terrier of some kind, but not really staffy. He is lovely, though. Hope you sort out your problems with him.
He has a hint of Staffy about him when viewed from the rear in those photo's but I too thought patterdale when looking at his head. So he's probably got a few breeds in the mix.