Yes, I would say he does have mental capacity;my mother says he forgets things and is not quite 'with it' and obviously his mental capacity is deteriorating ; he was a very intelligent, clever young man. When sober, I would say he does have capacity at this time. He knows our concerns , he might well agree to sign something letting us have control over his affairs but I really want to know how to protect him so he has a place to live and income if the worst happens. Obviously that will happen soon as our mum is not in good shape. We each inherited £50k from my father when he died (parents separated); he spent it all and gave it away.At that time I felt we should have done something but we didn't so I know the same will happen again with substantially more.
There is no way me and my brother want his share - we love him dearly but he can't look after himself, it's about caring for him.