This Q&A has taken into consideration the following questions: • What remedies are available to tenant A, direct against its neighbouring tenant B, where tenant B has constructed a terrace outside its demise and without other consent on a flat roof which is causing damage and disturbance to tenant A and its property?, and • Where the landlord under both leases is a company of which the only officers are tenant A and tenant B, what are tenant A’s remedies against its landlord, assuming both leases oblige the landlord to enforce tenant covenants? Claims against tenant B Trespass There may be a potential claim for trespass against tenant B if the airspace above flat A is demised. Generally, the accepted position is that there is no presumption in any lease of, or including, a roof that extends upwards to the full height of the airspace available to the lessor, see Rosebery Ltd v Rocklee Ltd. In H Waites Ltd v Hambledon