Paddock is the codeword for an alternative Cabinet War Room bunker for Winston Churchill's World War II government, located at 109 Brook Road, Dollis Hill, northwest London, NW2 7DZ; under a corner of the Post Office Research Station site. The name derives from the nearby Paddock Road NW2, in turn named after a nineteenth-century stud farm, the Willesden Paddocks, situated nearby. It comprises some forty rooms on two floors, is semi-derelict, with original equipment abandoned and rusted, and a certain amount of water ingress which is kept at bay by an electric extraction pump.