Royal Ordnance Factory (ROF Factory)

Entrance gates https://en.wikipedia.org/wiki/ROF_Bishopton
Built	1937
Location	Bishopton, Scotland
Industry	Defence
Products	Munitions
Employees	20,000+ (approx)
Area	2350 acres (890 acres within perimeter fence)
Defunct	2002

Here are some facts on the ROF from Wikipedia