Hi SadieMc81
Your Uncle needs to contact DLA and report a change of circumstances, as he is now state pension age he will not be able to change his mobility component but he can if eligible get the middle rate or high rate component.
There is a risk to the award he already has, we would advise him to seek advice from from his local Welfare Rights Organisation.
Gary
Nothing on this board constitutes legal advice - always consult a professional about specific problems