RAF Holmpton is a former Cold War era nuclear bunker that was built in the 1950s as an early warning radar station. Located just south of the village of Holmpton, in the East Riding of Yorkshire, England, RAF Holmpton is still (2013) a part of the Defence Estate (DIO) but is managed by the RAF Holmpton Preservation Society Registered Charity 1143594 In 2004 a major Public Exhibition opened at the site which now hosts regular public tours of the fully restored Cold War Bunker.
Between 2003 and 2009 RAF Holmpton was restored by the Holmpton Initiative Project Planning Office (HIPPO) which took on the original project as an Independent Finance Initiative at absolutely no cost to the UK taxpayer. In 2010 HIPPO completed its work and maintenance of the site passed to the Joint Support Unit. In August 2011 the JSU closed and The site is now maintained by the Royal Air Force Holmpton Preservation Society Registered Charity Number 1143594.
The site runs to about 36 acres (150,000 m2) and comprises a number of surface structures along with a secure 35,000 square feet (3,300 m2) command bunker which is about 100 feet (30 m) below ground.