Last month – almost 15 years after the Landlord and Tenant (Covenants) Act 1995 ("the Act") came into force - the High Court decided in Good Harvest Partnership LLP v Centaur Services Limited ("Good Harvest") that a tenant’s guarantor is released on a lawful assignment of a lease (entered into after 1 January 1996) and cannot be required to enter into an authorised guarantee agreement ("AGA").