Investment in prison health care has increased significantly from £118 million in 2002-03 to £200 million in 2006-07. This includes £20 million specifically available for mental health in-reach services each year from 2006-07. In 2007-08 the National Offender Management Service (NOMS) and the Department of Health are jointly investing £18.7 million in the introduction of the integrated drug treatment system (IDTS) in prisons.