Information on the numbers of temporary release licenses issued to prisoners in prison establishments within England and Wales can be found in table 10.6 in the Offender Management Caseload Statistics 2005, a copy of which can be found within the House of Commons Library. This table can also be found at the following website:
It should be noted that the table refers to the number of releases rather than the number of prisoners-, so the same prisoner could appear multiple times in the table. Further, the table includes releases that last longer than one day.
These figures are management information and may be subject to change.