Thank you for your answer!
I do believe my landlord's house is going to be repossessed ( if not repossessed until now already because I have been in contact with him and he has stated several times he doesn't have the money to pay anything to the mortgage lenders. Mortgage company is not getting my rent at the moment, therefore probably would be happy for me to leave earlier than contract ends so that they can sell the house and get money to cover mortgage lended? My last AST has an additional clause compared to the previous ones I have signed- there is a Ground 2 Notice To tenant- Mortgage,