An agreement which amounts to a tenancy at common law, and which also falls within the scheme of the Housing Act 1988 (HA 1988), is an assured tenancy. Many assured tenancies, when created, fall within Chapter II of the HA 1988 and are assured shorthold tenancies (ASTs). See Practice Note: A summary of types of private residential tenancies. An AST is subject to the rules about security of tenure which apply generally to all assured tenancies, including the following rules. Under HA 1988, s 5(1), an assured tenancy can only be brought to an end by the landlord in certain defined situations. The primary situation requires the execution of an order for possession obtained under HA 1988, s 7, after serving a notice under HA 1988 s 8, relying on one of the mandatory or discretionary grounds at Schedule 2 (for assured tenancies)