If the whole or any part of a penalty is not paid by the time by which it is required to be paid, the unpaid balance from time to time carries interest at the rate for the time being specified in section 17 of the Judgments Act 1838 (c 110) (unless a different rate is specified by the court under section 1225F(8)).
If an appeal is made under section 1225F in relation to a penalty, the penalty is not required to be paid until the appeal has been determined or withdrawn.
Subsection (2) does not prevent the court from specifying that interest is to accrue from an earlier date under section 1225F.
Where a penalty, or any portion of it, has not been paid by the time when it is required to be paid and—
the Secretary of State may recover from the body, as a debt due to the Secretary of State, any of the penalty and any interest which has not been paid.