‘ 101 (1) Subject to regulation 102 [use of other methods, which we understand is not applicable in this case] the amount of input tax which a taxable person shall be entitled to deduct provisionally [that is, subject to any adjustment required by regulation 107 in respect of a ‘longer period’] shall be that amount which is attributable to taxable supplies in accordance with this regulation. (2) In respect of each prescribed accounting period- (a) goods imported or acquired by and ... goods or services supplied to, the taxable person shall be identified, (b) there shall be attributed to taxable supplies the whole of the input tax on such of those goods or services as are used or to be used by him exclusively in making taxable supplies, (c) no part of the input tax on such of those goods or services as are used or to be used by him exclusively in making exempt supplies, or in carrying on any activity other than the making of taxable supplies, shall be attributed to taxable supplies, and (d) there shall be attributed to taxable supplies such proportion of the input tax on such of those goods or services as are used or to be used by him in making both taxable and exempt supplies as bears the same ration to the total of such input tax as the value of taxable supplies made by him bears to the value of all supplies made by him in the period.’
‘The deduction of input taxes is linked to the collection of output taxes. Where goods or services acquired by a taxable person are used for purposes of transactions that are exempt or do not fall within the scope of VAT, no output tax can be collected or input tax deducted.’