(1) For the purposes of this Division, the interest payable (if any) in respect of a repayment is an amount calculated—
(a) on the repayment, or any part of the repayment remaining unpaid;
(b) at the rate
determined from time to time under subsection 99 (1) of the Taxation
(Administration) Act 1987 for the purposes of
section 31 of that Act; and
(c) on a daily basis from the day following the date of the repayment notice under section 13.
(2) Where judgment is entered by a court for an amount equal to a repayment, or for the payment of an amount that includes an amount equal to a repayment—
(a) the repayment
is not to be taken, for the purposes of
subsection (1), to have ceased to be
due and payable only because judgment is entered; and
(b) if interest is payable on the judgment debt, that interest is, by force of this paragraph, reduced—
(i) if judgment is entered for the payment of an amount equal to the repayment—by the amount of the interest on the judgment debt; or
(ii) if judgment is entered for the payment of an amount that includes an amount equal to the repayment—by an amount that bears the same proportion to the amount of the interest as the amount of the repayment bears to the amount of the judgment debt.
(3) In this section—