His Majesty's Young Offender Institution (HMYOI) Aylesbury is a Young Offender Institution situated in Aylesbury, Buckinghamshire, England. It is located on the north side of the town centre, on Bierton Road and is operated by His Majesty's Prison Service. History There has been a prison or gaol of some description in Aylesbury since 1810. The current prison has been on its present site since 1847. It is of early Victorian design and was modelled on Reading County Gaol, The site was in an area of public buildings that also included the workhouse (formerly the Tindal Centre) and the Manor House Hospital. Since construction, the prison has gone through a variety of changes, starting as a county gaol, then became an adult women's prison in 1890, changing to a girls' borstal in the 1930s, and between 1959-1961 was an adult male prison, after which it became a male YOI, and since 1989 has held only male long-term prisoners. Operation In 1998 HMYOI Aylesbury was criticised after an inspection report highlighted its poor health regime, which saw the rapid turnover of five senior medical officers in two years. The report opened up a wider debate about the pay of medical staff in UK prisons compared to those in the NHS. In 2001 the Imam for HMYOI Aylesbury was suspended after allegations of inappropriate comments after the September 11 New York terror attacks. A year after this a study of Young Offenders' diets at Aylesbury (conducted by Surrey University) found that adding vitamins, minerals and other nutritional elements to the diets of Young Offenders 'remarkably' reduced their antisocial behaviour. HMYOI Aylesbury prison was back in the headlines in 2007 after it was revealed to have a higher rate of self-harm by inmates than any other Young Offenders Institution in England Following the introduction of the Prison Service's ACCT (Assessment, Care in Custody, and Teamwork) system the rate of self-harm has reduced significantly. In December 2008, police officers and Prison Service 'Tornado Teams' were called in to contain a disturbance at Aylesbury Prison, officially described as a 'Concerted Indiscipline'. The incident lasted six hours, and involved a number of inmates who were taking part in Eid celebrations. A number of these were charged with 'Prison Mutiny'. In November 2009, a Prison Officer from HMYOI Aylesbury was jailed after it emerged that she had become pregnant after having a sexual relationship with an inmate. The