CA 15 May 1990. The plaintiff, J, owned business premises and entered into negotiations with the defendant, A, with a view to A taking a lease . They had problems in reaching agreement on some of the terms such as whether A should have the right to sublet, nonetheless since A had nowhere else to put his stock, J gave him the keys and a receipt for £2,500, rent for three months in advance. Solicitors carried on negotiating the lease. A paid a further two installments of rent and some insurance rent. Completion of the permanent lease never took place and J brought possession proceedings. A claimed that he was a periodic tenant protected by Landlord and Tenant Act 1954 . H claimed that A had been a tenant at will whose tenancy had been determined by the demand of possession. The judge made an order for possession. A appealed. CA held that A had not become a periodic tenant therefore where parties are negotiating the terms of a proposed lease, and the prospective tenant is let into posse