The transfer of prisoners between jurisdictions within the United Kingdom is governed by the Crime (Sentences) Act 1997. For the purposes of the Act England and Wales are the same jurisdiction and therefore transfers to and from Northern Ireland and Wales are not recorded separately. Transfers between Scotland and Northern Ireland are a matter for the Scottish Executive.
The number of transfers are as follows:
In 2007 one prisoner transferred from Northern Ireland to England and Wales and 13 prisoners transferred from England and Wales to Northern Ireland;
In 2008 five prisoners transferred from Northern Ireland to England and Wales and five prisoners transferred from England and Wales to Northern Ireland.
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.
Records of the Northern Ireland Prison Service show that there have been two transfers between England and Wales and Northern Ireland since 2001.
There is no record of any prison officers currently being on secondment to Northern Ireland. Information on secondments that have now concluded is not available without incurring disproportionate cost.