HMP The Verne opened in 1949 within the Verne Citadel, which had been designed by Captain W. Crossman of the
Royal Engineers and built between 1857 and 1881 to defend
Portland Harbour. The new prison received its first inmates on 1 February 1949 with the arrival of an advance party of 20 prisoners. Since becoming established, the interior of the prison has been substantially rebuilt by prison labour, and the modern prison, a Category C prison for adult males, has gained a considerable training programme for its prisoners who are serving either medium- or long-term sentences, including life sentences. On 4 September 2013, the Ministry of Justice announced the decision to convert the prison into an immigration removal centre for 600 detainees awaiting deportation. The prison closed in November 2013, with all prisoners being transferred to other suitable prisons, and work to change the function of the prison began immediately. The prison was officially closed in January 2014 by the
Closure of Prisons Order 2014. The planned re-role came as part of a wider programme to modernise the prison estate, and the nearby
HM Prison Dorchester closed soon after, in December 2013. With a set opening date in February 2014, it was later announced in March 2014 that the immigration removal centre plans were officially put on hold until September. However, the Prison Service announced that the empty prison would still begin to take on immigration detainees that month and would still remain known as HMP The Verne. It began holding detainees from 24 March 2014. IRC The Verne reverted to a prison in 2018. ==Inspection reports==