The statutory security of tenure conferred upon the tenants of private residential property has long been (to mix two metaphors) a fertile battle ground, with landlords and their legal advisers showing great ingenuity in devising agreements designed to circumvent the provisions of the legislation. Most famously, of course, there was the loophole of disguising the lease as a mere licence to occupy, which was effectively closed off by the House of Lords in Street v. Mountford [1985] A.C. 809. It is perhaps surprising that although security of tenure was first introduced as long ago as 1920, landlords are still able to come up with new devices in the attempt to ensure that they can regain possession of their property whenever they wish. One such device was the recent subject of consideration by the Court of Appeal in Bankway Properties Ltd. v. Pensfold-Dunsford [2001] 1 W.L.R. 1369.