(1) In section 16(3B) of the Sentencing Act 1991 for "Every" substitute "Subject to subsection (3BA), every".
(2) After section 16(3B) of the Sentencing Act 1991 insert —
"(3BA) Every term of imprisonment imposed on a prisoner for an offence against section 78A of the Corrections Act 1986 must, unless otherwise directed by the court because of the existence of exceptional circumstances, be served cumulatively on—
(a) any period of imprisonment the prisoner may be required to serve in custody in a prison on cancellation of the parole order under which that prisoner was released when he or she committed the offence against section 78A; and
(b) any period of imprisonment imposed on the prisoner for an offence committed while released under the parole order referred to in paragraph (a), whether before or at the same time as that term.".