Posted: 27/08/2014 at 08:54
I would imagine that he's contravening his tenancy agreement.
I would also assume that the Fire Service are going to be notifying either the council or the police or both - all sorts of rules and regs are presumably being conravened.
If I were you I would also make a formal written complaint to the council re noxious and possibly hazardous fumes.
They can issue him with an order to make him clear up his property - and if he's physically/mentally not able to do that they can arrange for it to be done.