Old RAE Bedford. Also known as Twinwoods Business Park. Once a military testing facility. A huge range of spaces: Warehouses, production offices, set build warehouses, basements, tunnels, labs, tunnels, courtyards, roads and testing facilities. 

Distance from London:
44 Miles from the M25

Wonderful bunker complex. Cast concrete brutalist structures. 

Distance from London:
47 miles from the M25

Disused military base. Fenced and secured with security gatehouses and checkpoints. Large hangers and watchtowers. Could easily double for America, Russia or mainland Europe. 

Distance from London:
47 Miles from the M25

Military underground bunker facility with offices, accommodation, barracks, control centre and long corridors.

Distance from London:
28 Miles

Hangar for filming excellent for the set build, soundproofed, also a control room.

Distance from London:
71 miles from the M25