I reassure the right hon. Lady that I certainly was not misleading the House: there is no central record of those who have received a positive, conclusive grounds decision and are detained under immigration powers. While that information may be obtainable from the live Home Office case information database, otherwise referred to as CID, the information would be for internal management only. For example, some data may be incomplete and freedom of information requests are heavily caveated as such.
Releases of data from CID are always caveated and sometimes it is possible the data is not always accurate; there may be instances where individuals are counted twice. It is standard practice in parliamentary questions that we do not provide information that does not form part of published statistics. CID will show only those individuals who have been referred into the NRM from immigration teams and would not cover those referred to the NRM from other first responders, such as the police, social services or, potentially, medical practitioners.
The right hon. Lady asks specifically about the 507 individuals referred to in the After Exploitation report. I want to be very clear on this point: those were not 507 individuals detained after getting a positive reasonable grounds. As stated very clearly in the freedom of information response, the figure relates to people who had a positive reasonable grounds when entering detention or while in detention.
Further analysis of the figures shows that, of the 507 people in question, 479 received the positive reasonable grounds decision during a detention period—and of those, 328, or 68%, were released within two days of the decision and in total 422 were released within a week. Of the 57 detained for eight days or more following a positive reasonable grounds decision, 81% were foreign national offenders.