Erlestoke Prison receives adult male prisoners from much of England and Wales, as well as from local prisons in South Wales and Bristol in particular. Accommodation at the prison comprises eight accommodation units: three Enhanced (Imber, Sarum and Silbury A); two Standard (Alfred and Wessex); 1 Lifer and long-term prisoner unit (Wyren) and an Induction Unit (Silbury B). There are also a Drug Recovery Unit (Marlborough) and a progressive regime unit (Imber).
