Under section 5(2) of the Housing Act 1988 (HA 1988), upon the expiry of a fixed-term assured shorthold tenancy (AST), a periodic tenancy arises on the same terms and conditions. This does not apply if the tenancy comes to an end by order of the court or surrender or other action on the part of the tenant. It is assumed for the purpose of this Q&A that HA 1988, s 5(2) applies to this tenancy. However, if that is not the case and the tenancy has been varied, the guarantee may have been released. A guarantee can be lost where changes are made (expressly or by conduct) to the underlying contract, unless the guarantor consents, or