Question to the Home Office:

To ask the Secretary of State for the Home Department, what proportion of people held in immigration detention are (a) foreign national offenders convicted of immigration related offences, (b) foreign national offenders convicted of other offences and (c) non-foreign nationals.

At the end of June 2015, the proportion of people held in immigration detention who were foreign national offenders was 25% (884).

It is not possible to provide a break-down of foreign national offenders convicted of immigration offences and foreign national offenders convicted of non-immigration offences. Such data is not aggregated in national reporting systems, which would mean these questions could only be answered through a disproportionately expensive manual case search to collate the data.