Prisoners: Supervision Lord Hylton asked Her Majesty's Government: How many prisoners are currently subject to supervision under the multi-agency public protection arrangements. [HL2064] The Minister of State, Home Office (Baroness Scotland of Asthal) Within the multi-agency public protection arrangements (MAPPA), the police, probation and prison services work together to assess and manage the risk presented by the most serious sexual and violent offenders in the community, so as to protect the public. Serving prisoners are not therefore subject to active MAPPA supervision. However, prisoners who need to be supervised within MAPPA on release from custody are assessed well in advance of their release date, in order that the MAPPA agencies may draw up risk management and supervision plans to take effect as soon as they are released. National and local data on MAPPA offenders managed in the community are available in the Libraries of both Houses and at www.probation.homeoffice.gov.uk/output/page30.asp.