HMP Guys Marsh is a category C training prison. Opened in 1960 as a borstal, Guys Marsh became a young offender's institution (YOI) in 1984. After completion of perimeter fencing in 1992 it became a closed establishment and began to accommodate adults.

In 2008 the young offenders were moved out and Guys Marsh became an adult male Cat C prison holding Life Sentenced and Indeterminate Sentenced Public Protection prisoners (IPPs) as well as those undertaking the Integrated Drug Treatment Service (IDTS). Guys Marsh is a designated Foreign National Prisoner Centre and is noted as a Priority Prolific Offender Centre of Excellence.

Address:

Shaftesbury
Dorset
SP7 0AH

Tel: 01747 856400
Fax: 01747 856401

Governor: Duncan Burles

Category: C
Reception criteria: Normal reception arrangements.
Accommodation: Seven residential units have cellular accommodation and one unit has less secure rooms.
Operational Capacity: 578 as of April 2012