um yeah
OK
this would be better off in Law
He needs to get his arriss into gear and find out for himself and not get his mother to do it for him
He also needs to get the idea that if you/he ask X for advice ( in this case the estate agent) then the advice will be to minimise the estate agents ( X's) liability and not his
a regrettable fact of life
he needs to find out if the lease is tenants in common or joint. 'O I fink it is joint or something' is not good enough.
Joint is - liable for all rent ( even 'her'share )
common is liable for his share - 50%
He can convert a jointure to a commonalty by a letter to the interested parties - girlie and estate agent. The estate agent wont have told him that a) because they arent obliged to give him advice and b) they lose up to half the rent....
otherwise he is stuck until the end of the lease
when does it end ( determine ) ?
any joint credit cards etc he needs to close down
and so you can see- that delaying a visit to the CAB or shelter will just end up costing him and / or you money.