This section applies if—
A specified prosecutor may at any time refer the case back to the Crown Court if—
A case so referred must, if possible, be heard by the judge who passed the sentence to which the referral relates.
If the court is satisfied that the offender knowingly failed to give the assistance it may substitute for the original sentence a sentence that is—
Subsections (6) to (9) apply where a sentence is substituted under subsection (4).
Section 52(2) or, as the case may be, 322(4) (requirement to explain reasons for sentence or other order) applies where a substitute sentence is imposed under subsection (4) unless—
Where the substitute sentence is less than the original maximum and the court considers that it would not be in the public interest to disclose that fact—
Any part of the original sentence which the offender has already served must be taken into account in determining when the substitute sentence has been served.