The Energy-Saving Items Regulations 2006
Section 312 of the Income Tax (Trading and Other Income) Act 2005 (c. 5) provides for expenditure on energy-saving items to be deducted in calculating the profits of a property business. Subsection (5) of section 312 provides that cavity wall insulation and loft insulation are energy-saving items; and paragraph (c) of section 312(5) provides that an energy-saving item also includes such other descriptions of items of an energy-saving nature as may be specified in regulations made by the Treasury.