(1) Subject to subsection (2) of this section, if any sum required to be paid by a person under a confiscation order is not paid when it is required to be paid (whether forthwith on the making of an order or at the time specified by the court), that person shall be liable to pay interest on that sum for the period for which it remains unpaid and the amount of the interest shall for the purposes of enforcement be treated as part of the amount to be recovered from him under the confiscation order.

(2) The amount of interest payable under subsection (1) of this section shall be disregarded for the purposes of calculating the term of imprisonment to be imposed by virtue of section 19 of this Act.

(3) The rate of interest payable under subsection (1) of this section shall be that for the time being applying to a High Court civil judgment debt.