definiens: means any person or firm appointed by or acting for the Landlord ( including an employee of the Landlord or a Group Company ) to perform the function of an accountant for any purpose of this Sub - Underlease means any neighboring or adjoining land or property in which the Landlord the Superior Lessor or a Group Company has a freehold or leasehold interest or in which during the Term the Landlord ( or a Group Company ) shall have acquired a freehold or leasehold interest means the specification attached hereto as appendix 1 and headed means the buildings erected on part of the Premises means the pedestrian ways and landscaped areas and any other areas which are from time to time during the Term provided by the Landlord for common use and enjoyment by the tenants and occupiers of the Estate and all persons expressly or by implication authorized by them means all existing and future ( but only to the extent that they come into existence during the perpetuity period ) pipes sewers drains mains conduits gutters watercourses wires cables channels subways flues and all other conducting media including any fixings louvres cowls and other covers means : ( a ) any Act of Parliament and ( b ) any European Community or other supra - national legislation having the force of law in the United Kingdom and references ( whether specific or general ) to any Enactment include any statutory modification or re - enactment of it for the time being in force and any order instrument plan regulation permission or directive made or issued under it or under any Enactment replaced by it or deriving validity from it CONFIDENTIAL TREATMENT REQUESTED BY A VIRON [ I -CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN TIllS DOCUMENT, MARKED BY BRACKETS, IS FILED WITII THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2 OF TIlE SECURITIES ACT OF 1934, AS AMENDED