Information on the number of prisoners released under the End of Custody Licence (ECL) scheme each month by (a) prison establishment, and separately (b) offence group have been placed in the House Library. To produce a table that showed a combined breakdown of the number of ECL releases each month by offence group in each prison establishment would incur disproportionate cost.
The figures presented in the answer are published monthly and available on the Ministry of Justice website at:
http://www.justice.gov.uk/publications/endofcustodylicence.htm
These figures have been drawn from administrative IT systems which, as with any large scale recording system, are subject to possible errors with data entry and processing.