This Practice Note provides guidance upon the tenancy condition, which must be satisfied in order for a tenant to have security of tenure pursuant to section 79 of the Housing Act 1985 (HA 1985). It also considers the issues which can arise where security of tenure is threatened. Security of tenure A tenant of a dwelling house, let as a separate dwelling, will have security of tenure as a secure tenant in accordance with HA 1985, s 79 at any time where the ‘landlord condition’ and the ‘tenant condition’ are satisfied. The ‘landlord condition’ is that the interest of the landlord belongs to one of several prescribed authorities or bodies. In practice, the landlord will generally be a local authority. The ‘tenant condition’ is that the tenant is an individual and occupies the dwelling house as his or her only or principal home (or, where the tenancy is a joint tenancy, at least one of them occupies the dwelling house as their only or principal home). Security of tenure is often described as