Thanks Heywood,
This is the family, but where is granddad? We've tried to see if he was staying with relations, but so far have had no luck with this. We're beginning to think that we might have the wrong first name & that he was registered on the census as either John or James (only because the ages are about right), but he was never referred to by those names. We've asked for copies of these, but they haven't arrived yet. I don't know whether they will get us any further.
Whilst writing, I see you're thinking the same about him being John or James. Do you know beside the birth certificates if there are any other documents I should be checking ?