Landlord and tenant – Service charge. In the language of s 20B(1) of the Landlord and Tenant 1985, at each level in the contractual chain, a cost had been incurred by each landlord in turn when it had received a demand for payment of its liability. The Upper Tribunal (Lands Chamber) so held in allowing the appeal by a landlord company against a decision by the First-tier Tribunal (Property Chamber) regarding the liability of residential leaseholders to pay to their immediate landlord a charge for services provided by a superior landlord.