http://www.legislation.gov.uk/apni/1941/9/section/2Landlord and Tenant (War Damage) Act (Northern Ireland) 1941An Act to modify the rights and liabilities of landlords, tenants and other persons interested in land damaged by war.texttext/xmlenStatute Law Database2011-05-262006-01-01 PART I21Where, by virtue of the provisions (whether express or implied) of any lease (whether made before or after the passing of this Act) or any contract collateral thereto, an obligation to repair is imposed on the tenant, the lease shall have effect as if there were contained therein covenants by the tenant with the landlord that, in the event of war damage occurring to the land comprised in the lease, the tenant will—aas soon as practicable after the damage has become known to him, serve a notice on the landlord stating that the damage has occurred and the general nature of the damage so far as it is known to him; andbpermit the landlord or any person authorised by him, at such times as may be reasonable in the circumstances, to enter upon the land for the purpose of ascertaining the extent of the damage and making it good either temporarily or permanently.2The foregoing sub-section shall have effect as if references to a lease, tenant and landlord included respectively references to a mortgage, mortgagor and mortgagee:Provided that it shall not be lawful for a mortgagee without the leave of the court to enforce any right or remedy arising out of a breach of the covenant referred to in paragraph ( a) of the foregoing sub-section.