AG Securities v Vaughan
AG Securities v Vaughan and Antoniades v Villiers [1988] UKHL 8 were two House of Lords cases decided in the same ruling, which together clarified and confirmed as pivotal the role of exclusive possession in identifying what constitutes a lease (including a tenancy) for the purposes of English land law. == Facts and prior Court of Appeal rulings == In the first case, AG Securities, an unlimited company, owned 25 Linden Mansions, Hornsey Lane, London: four bedrooms and communal areas (for the bedrooms' occupants).