Can anyone help please? It's a little complicated but will try to keep it short. I rented my property on a 6 month AST to someone who owns next door and wanted to buy my property to knock through. It all started off well but the sale fell through - no fault of anyone's in particular and he has turned nasty. His tenancy ended on 31st October but he refused to leave and said he'd leave when he wanted. (even though he owns the empty property next door!) He was supposed to pay the rent for November on 26th October but obviously cancelled his direct debit because I didn't receive it and still haven't. I tried to take a prospective new tenant around there (giving him 24 hours notice) but it was hopeless as the tenant was obstructive and abusive. I have written him formal letters requiring him to leave on Nov 30th and follow up letters about rent but he hasn't responded. I then read I should have given him two months notice, so do I need to do this now or does the fact that his rent is now over 16 days late, mean this is void and I can get him out? I requested a meeting giving him 24 hours notice but he said it wasn't convenient. What on earth can I do?