from historic Bath Stone quarries. The largest of the above-ground sites are centred around the Hawthorn area of Corsham. Basil Hill site The Basil Hill site is in Westwells Road and comprises the former Basil Hill Barracks; the site is now designated MOD Corsham and accommodates approximately 2,100 people. It is home to UK Strategic Command's Defence Digital organisation and also houses the Ministry of Defence's Global Operations Security Control Centre, amongst other units. Rudloe site The Rudloe site, bordering Westwells Road and Bradford Road, was one of three sites that comprised RAF Rudloe Manor. Rudloe Manor was established during the Second World War as a non-flying station for administrative and command & control purposes. It was home to HQ Number 10 Fighter Group, RAF Regional Command, Headquarters RAF Police & Security Services, No 1 Signals Unit, Controller Defence Communications Network and 1001 Signals Unit. The main site also served as the primary entrance for the Central Government War Headquarters, variously known as "Turnstile", "Stockwell", "Subterfuge" and "Burlington". By 1998 it had become mostly administrative, housing the RAF Provost and Security Services, which dealt with security and criminal investigation. The sites were taken over by the Defence Communication Services Agency in about 2000, while the detachment of 1001 Signals Unit of the RAF remained at the Hawthorn site until its privatisation. RAF Rudloe Manor was then absorbed into Joint Support Unit Corsham. Hawthorn site Hawthorn site, on Skynet Drive, previously accommodated the RAF 1001 Signal Unit detachment of RAF Rudloe Manor. The site supports the Skynet military communications satellite constellations, which is now managed by Astrium Services under a PFI arrangement. Copenacre site The Copenacre site, off the A4 Bath Road about west of Corsham, was originally an underground stone quarry below land formerly part of the Hartham estate; this was taken over by the Ministry of Defence in 1937 and became the Royal Naval Stores Depot, Copenacre. The underground stores closed on 30 September 1995. The site closed completely in January 2011 and was sold. In 2016 demolition started to redevelop the brownfield site into housing. Two original mine structures remain incorporated into the development, one being a shaft entrance. Other units The Joint Support Unit provides administrative support and facilities management for all three locations. In 2006 a Private Finance Initiative contract was let to Inteq for the renewal and expansion of the Basil Hill and Rudloe Site