No change is being made to the basic contractual position of the tenant remaining liable for rent for the whole period of the fixed term of a tenancy agreement. However, depending on the contractual provisions of the tenancy agreement, during the fixed term of a tenancy a break clause in the tenancy agreement may be effected to bring that fixed term period to an end. A new tenancy could then be agreed between both landlord and tenant on different terms, including the specified amount of rent lawfully due.
If the fixed terms of an assured shorthold tenancy have expired, and the tenancy is a statutory periodic tenancy, the terms of the tenancy agreement can be modified where mutually agreed by a landlord and a tenant and confirmed in writing.
Any landlord wishing to modify a tenancy agreement with a tenant should seek legal advice in the first instance.