“(1) Subject to the following provisions of this section, “input tax”, in relation to a taxable person, means the following tax, that is to say— (a) VAT on the supply to him of any goods or services; … being (in each case) goods or services used or to be used for the purpose of any business carried on or to be carried on by him.”
“(1) The amount of input tax for which a taxable person is entitled to credit at the end of any period shall be so much of the input tax for the period (that is input tax on supplies, acquisitions and importations in the period) as is allowable by or under regulations as being attributable to supplies within subsection (2) below.
“Group 5—Construction of buildings, etc Item No 1 The first grant by a person— (a) constructing a building— (i) designed as a dwelling or number of dwellings; or … of a major interest in, or in any part of, the building, dwelling or its site.”