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 the order or at a time specified under section 31(1) of the PowersM1 of Criminal Courts Act 1973) 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.

The Crown Court may, on the application of the prosecutor, increase the term of imprisonment or detention fixed in respect of the confiscation order under subsection (2) of section 31 of the 1973 Act (as it has effect by virtue of section 9 of this Act) if the effect of subsection (1) above is to increase the maximum period applicable in relation to the order under subsection (3A) of that section.

The rate of interest under subsection (1) above shall be that for the time being applying to a civil judgment debt under section 17 of the JudgmentsM2 Act 1838.