“Whether the supply of the installation of energy saving materials together with services of installation of boiler and other central heating products is a single supply subject to [a] single rate of VAT or is a single supply subject to two or more different rates of VAT or, in the alternative, are two or more separate supplies subject to different rates of VAT.”
“2. The question whether there is one supply or two is a question of law on which the court is entitled and bound to form its own view (see British Airways plc v Customs and Excise Comrs[1990] STC 643 . 3. In deciding whether there is one supply or two where two separate elements are present, the test is whether one element is ‘incidental to, or an integral part of’ the other (see Customs and Excise Comrs v United Biscuits (United Kingdom) Ltd (trading as Simmers[1992] STC 325 ).”
“The supply of the installation of energy saving materials together with services of installation of a boiler or of a central heating system is a single supply subject to a single rate of VAT at the standard rate.”