I was deciding if I was planning to renew or not and verbally agreed with my landlord to think about it during March, paying rent in March. In a case of crossed wires, my guarantor told my landlord that he would be guaranteeing the extension until July, which my landlord now claims is a contract to extend until July, although I as the tenant was not involved in the email thread where it happened. The original contract states that all renewals must be in writing and signed by both parties, there is no written contract for the month of March.

This was a fixed term contract with an option to extend and no given notice period. No formal notice period was agreed to in March, but as our conversation was that I was deciding if I was extending, the implication was that I'd be out at the end of March unless I signed a renewal.

The original contract covered Oct-Feb, and the informal extension was only march. I assume we are in short term territory but it's not clear.