Thank you all so much for your responses!
He has had no other tests done, only bloods which I've outlined above.
What the specialist will do, we don't know.

I'm really starting to doubt that this is a problem related to when he was drinking, as he has not touch a drop of alcohol for 14 mths. I do have to add I and our children are very, very proud of him!

Mrs D, I will telephone the Dr's tomorrow and ask for the B12 results figures. Is it ok if I come back to you with them?
I have to be honest, I don't really understand the terminology that is used in the forums and the names of treatments and meds means very little to me

He has had an on going back problem, which always seemed related to lifting heavy loads. Since stopping work last year his back has been fine.

Thanks again you lovely people for your help.
With kindest regards
Buttercup x