RAF Rudloe Manor, formerly RAF Box, was a Royal Air Force station located north-east of Bath, England, between the settlements of Box and Corsham, in Wiltshire. It was one of several military installations situated in the area and covered three dispersed sites. The sites are now used by Defence Digital. History The station was established on top of quarries from which Bath Stone had been extracted. In the 1930s some of the tunnels had been converted for use as a Central Ammunition Depot. The vast caverns had some of space, divided into many smaller chambers. During the Second World War, the Operations Centre of No. 10 Group RAF was housed there in three buildings (Operations Room, Filter Room and Communications Centre), which were partially buried for protection, in a similar way to buildings for No. 9 Group at RAF Barton Hall, No. 11 Group RAF at RAF Uxbridge, No. 12 Group RAF at RAF Watnall, No. 13 Group RAF at RAF Newcastle and No. 14 Group RAF at Raigmore House in Inverness. Operations room The operations room, responsible for directing RAF aircraft in the No. 10 Group area, was initially established in a block adjacent to the manor house in June 1940. The area covered by No. 10 Group encompassed South West England and South Wales. Later in the year the operations room was relocated into the north end of an underground bunker in Browns Quarry. The operations room became disused in May 1945 when No. 10 Group was disbanded. Filter room The Filter Room, responsible for filtering large quantities of intelligence on enemy activity before it was passed to the operations room, was located in the south end of the underground bunker in Browns Quarry and became operational in 1940. The filter room became disused in May 1945 when No. 10 Group was disbanded. Eileen Younghusband, who served in various filter rooms, recounted her experiences at Rudloe Manor in her 2011 memoir, "One Woman's War". The Communications centre was located in the west part of the underground bunker in Browns Quarry. The members of the Women's Auxiliary Air Force who staffed the underground bunker were billeted at nearby Hartham Park. RAF units using the site were: RAF Rudloe Manor is known as "Britain's Area 51" since declassified secret files released at the National Archives indicated the site was the centre for UFO investigations in the 1950s. The wider site