Huntercombe opened as a prison in 1946 but the site had been used as an internment camp during the Second World War. In November 2010, the establishment became a category C adult prison, holding foreign nationals
- Howard unit, 79 prisoners.
- Fry unit, 79 prisoners
- Rich unit, 79 prisoners (induction unit)
- Patterson unit, 73 prisoners
- Mountbatten unit, 120 prisoners