"Therefore as is clear from the decisions of the Court of Appeal in R v Sharkey[2001] 1 Cr App R(S) 541 and R v Stocker[2003] 2 Cr App R(S) 54 , page 35, when a judge passes a sentence pursuant to section 116 of the 2000 Act he must take account of any period that the offender spends in custody following 'administrative recall' pursuant tosection 39 of the 1991 Act . In taking account of that period, it must be remembered that the time spent in custody on recall under section 39 will not count for the purposes of calculating the date of the offender's date of release on licence under the early release provisions of sections 33 to 35 of theCriminal Justice Act 1991 . Therefore, if the offender is a short term prisoner, that would mean that for the purposes of calculating the maximum period available for a sentence under section 116 of the 2000 Act, the judge must reduce the maximum period available by twice the time spent in custody pursuant tosection 39 of the 1991 Act : see R v Stocker[2003] 2 Cr App R(S) 54 , in particular at page 337, andsection 67 of the Criminal Justice Act 1967 ."