Hi buster,
I can't comment on why DWP are sending your husband another review. I do know that reviews are being sent out early at present, but with a long return date, due to anticipated delays due to the pandemic. If you want to find out more maybe ring DWP and query it with them.
If you do not comply with the review, then there is a danger your husband's benefit could be stopped.
I'm sorry I can't be more helpful.
LL26
Nothing on this board constitutes legal advice - always consult a professional about specific problems 
