| Rocket Propulsion Establishment | |
|---|---|
| Westcott, Buckinghamshire, UK | |
 | |
  Rocket Propulsion Establishment Location within Buckinghamshire | |
| Coordinates | 51°50′31″N 0°58′30″W / 51.842°N 0.975°W |
The Rocket Propulsion Establishment at Westcott, Buckinghamshire on the site of the former RAF Westcott has made a number of notable contributions in the field of rocket propulsion, including input on the rocket design for the Blue Streak missile and the propulsion systems on Chevaline. It was also known as the Guided Projectiles Establishment and PERME Westcott (Propellants, Explosives and Rocket Motor Establishment, Westcott).
For many years this establishment was regarded as so secret that it was not marked on Ordnance Survey maps, although it was present, from necessity, on maps for the use of pilots.