The Operational Support Group (OSG) was established in 2008 to combat the supply of contraband to prisons, such as drugs, mobile phones and weapons. The OSG has prison officers assigned across its three areas, the Security Screening Unit, the Canine Unit and the Operational Support Unit, and currently has just under 140 staff. The OSG has headed up concerted efforts to prevent the flow of contraband into our prisons, by for example the installation of nets over exercise yards, vigilant observation of prisoners by staff, enhanced CCTV monitoring, the stricter control of visits and the use of targeted and random cell searches on a daily basis. Random searches of cells and their occupants have uncovered significant quantities of contraband in recent years. Measures have also been taken to counteract the use of drones. In addition, a free confidential telephone line has been introduced by which prisoners, visitors, staff or members of the public with information on the trafficking of prohibited items into prisons can pass on that information in the strictest confidence.