There is nothing to prevent the parties agreeing a surrender of a residential tenancy. A surrender is a voluntary act of the parties whereby, with the landlord's consent, the tenant surrenders his lease to the landlord so that the lease merges with the reversion and is thus brought to an end. The surrender may be either express, that is by an act of the parties having the expressed intention of effecting a surrender, or by operation of law, that is as an inference from the acts of the parties. A surrender must be of the entire term in the premises, hence, a tenancy held jointly cannot be surrendered by one of two joint tenants. A part only of the demised premises may, however, be surrendered provided that the landlord consents to this. Although the basic contractual position is that the tenant is liable for the rent for the whole of the fixed term, the Office of Fair Trading has issued guidance on what it