There were 418 children who initially entered detention at immigration removal centres (IRCs) in 2010, 85 in 2011 and 97 in 2012. These figures exclude those children who entered at short term holding facilities and pre departure accommodation. Since the new family returns process was rolled out fully in August 2011, children (under-18s) may be held in IRCs only as part of family groups stopped at the border while inquiries are made to determine whether they may be safely admitted or, on rare occasions, in criminal cases. In these circumstances, families are held together in the specially designed family unit at Tinsley House. It is not the policy to detain unaccompanied children. Occasionally, information may subsequently emerge to show that an individual who has been detained as an adult is under 18; in those cases, individuals are released as soon as suitable arrangements can be made for their care. The Home Office publishes quarterly and annual statistics on the number of people detained in the UK within Immigration Statistics. The data on people entering detention are readily available in the latest release, Immigration Statistics: January to March 2013, table dt_01 from the Gov.uk website: https://www.gov.uk/government/organisations/home-office/series/immigration-statistics-quarterly-release Published figures on people held are those detained in the United Kingdom solely under Immigration Act powers, including short term holding facilities and pre departure accommodation in addition to immigration removal centres but excluding those in police cells, Prison Service establishments, short term holding rooms at ports and airports (for less than 24 hours), and those recorded as detained under both criminal and immigration powers and their dependants.