The Landlord and Tenant Act 1985 (LTA) states that where the landlord has granted a lease of less than seven years, or a periodic tenancy, the landlord will normally be responsible:
(a) to keep in repair the structure and exterior of the dwelling, including drains, gutters and external pipes,
(b) to keep in repair and proper working order the installations in the dwelling for the supply of water, gas, electricity and for sanitation (including basins, sinks, baths and sanitary conveniences) but not other fixtures, fittings and appliances for making use of the supply of water, gas or electricity, and
(c) to keep in repair and proper working order the installation in the dwelling for space heating and heating water. (Section 11, LTA 1985)