All young offenders sentenced to Detention in a Young Offender Institution (DYOI), which is the most common custodial sentence for this age group, are held in appropriately designated YOI accommodation within the prison estate. The majority of this accommodation is in dedicated YOIs, although some establishments in the estate have a dual designation (designated both as a prison and a YOI) and hold both adult prisoners and young offenders. The following table shows the number of offenders aged 18-20 years old with a recorded residential address or proxy in the London borough of Islington who were held in predominant function male Young Offender Institutions, predominant function male local prisons and other prisons (including female prisons) on a set day in each month where data is available since May 2009.
|Number and location of male and female young adult offenders (aged 18-20) originating from a local borough of Islington|
|Location||May 20 09||Sep tember 20 10||Nov ember 20 10||January 2011||Mar ch 2011|
|(a) Male Young Offender Institutions||47||31||33||27||29|
|(b) Male local prisons||0||1||2||1||2|
|(c) Other prisons (including female prisons)||4||11||8||12||12|
|Location||May 20 11||Jul y 20 11||Sep tember 20 11||Nov ember 20 11||Jan uary 20 12|
|(a) Male Young Offender Institutions||29||31||41||45||40|
|(b) Male local prisons||0||3||3||1||2|
|(c) Other prisons (including female prisons)||6||6||7||7||7|
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.
Information on offenders' residences is provided by offenders on reception into prison and recorded on a central IT system. Addresses can include a home address, an address to which offenders intend to return on discharge or next of kin address and these figures are provided in the table above.
If no address is given, an offender's committal court address is used as a proxy for the area in which they are resident. These figures are also included in the table above. No address has been recorded and no court information is available for around 3% of all offenders, these figures are excluded from the table above.