Following the introduction of section 19a of the Housing Act 1988, an AST is the most common type of residential tenancy. They differ from ATs as under an AT, a tenant has greater security of tenure. Under an AST, a landlord can regain possession of the property after the fixed term expires but under an AT a tenant is allowed to remain at the property until they choose to leave or the landlord acquires the property on one of the grounds stated in the Housing Act 1988.
