Your husband may wish to make a further appeal to the Upper Tribunal.
To consider an appeal to the Upper Tribunal he will need to ask for a full Statement of Reasons and the Record of Proceedings. The ROP is the judge's notes of what happened and the oral evidence given at the hearing. The SOR is a statement that the judge will have to write from the notes explaining his reasons for the decision.
There is a strict one-month time limit for applying for a SOR and he can only appeal to the UT on legal grounds (errors of law). I should warn him that it can take one or two months to receive the SOR.
Nothing on this board constitutes legal advice - always consult a professional about specific problems