“78. Interest in certain cases of official error. (1) Where, due to an error on the part of the Commissioners, a person has- (a) accounted to them for an amount by way of output tax which was not output tax due from him and, as a result, they are liable under section 80(2A) to pay (or repay) an amount to him, or (b) failed to claim credit under section 25 for an amount for which he was entitled so to claim credit and which they are in consequence liable to pay to him, or (c) (otherwise than in a case falling within paragraph (a) or (b) above) paid to them by way of VAT an amount that was not VAT due and which they are in consequence liable to repay to him, or (d) suffered delay in receiving payment of an amount due to him from them in connection with VAT, then, if and to the extent that they would not be liable to do so apart from this section, they shall pay interest to him on that amount for the applicable period, but subject to the following provisions of this section. (1A) In subsection (1) above- (a) references to an amount which the Commissioners are liable in consequence of any matter to pay or repay to any person are references, where a claim for the payment or repayment has to be made, to only so much of that amount as is the subject of a claim that the Commissioners are required to satisfy or have satisfied; and (b) the amounts referred to in paragraph (d) do not include any amount payable under this section. (2) Nothing in subsection (1) above requires the Commissioners to pay interest- (a) on any amount which falls to be increased by a supplement under section 79; or (b) where an amount is increased under that section, on so much of the increased amount as represents the supplement. (3) Interest under this section shall be payable at the rate applicable undersection 197 of the Finance Act 1996 . ………….. 79. Repayment supplement in respect of certain delayed payments or refunds. (1) In any case where- (a) a person is entitled to a VAT credit, or (b) ……. (c) …….. (d) ……. (e) …….. and the conditions mentioned in subsection (2) below are satisfied, the amount which, apart from this section, would be due by way of that payment or refund shall be increased by the addition of a supplement equal to 5 per cent. of that amount or£50 , whichever is the greater. (2) The said conditions are- (a) that the requisite return or claim is received by the Commissioners not later than the last day on which it is required to be furnished or made, and (b) that a written instruction directing the making of the payment or refund is not issued by the Commissioners within the relevant period, and (c) that the amount shown on that return or claim as due by way of payment or refund does not exceed the payment or refund which was in fact due by more than 5 per cent. of that payment or refund or£250 , whichever is the greater. (2A) The relevant period in relation to a return or claim is the period of 30 days beginning with the later of- (a) the day after the last day of the prescribed accounting period to which the return or claim relates, and (b) the date of the receipt by the Commissioners of the return or claim. ………….. 85A. Payment of tax on determination of appeal (1) This section applies where the tribunal has determined an appeal under section 83. (2) Where on the appeal the tribunal has determined that- (a) the whole or part of any disputed amount paid or deposited is not due, or (b) the whole or part of any VAT credit due to the appellant has not been paid, so much of that amount, or of that credit, as the tribunal determines not to be due or not to have been paid shall be paid or repaid with interest at the rate applicable undersection 197 of the Finance Act 1996 . (3) Where on the appeal the tribunal has determined that- (a) the whole or part of any disputed amount not paid or deposited is due, or (b) the whole or part of any VAT credit paid was not payable, so much of that amount, or of that credit, as the tribunal determines to be due or not payable shall be paid or repaid to HMRC with interest at the rate applicable undersection 197 of the Finance Act 1996 . (4) Interest under subsection (3) shall be paid without any deduction of income tax. (5) Nothing in this section requires HMRC to pay interest- (a) on any amount which falls to be increased by a supplement under section 79 (repayment supplement in respect of certain delayed payments or refunds); or (b) where an amount is increased under that section, on so much of the increased amount as represents the supplement.”