Much of their work remains classified to this day – despite it closing in the 1980s.
Now a building that was home to so many secrets is about to be transformed.
A Fife couple, who bought the land in Cupar 2012, have been given planning permission to turn it into a stunning private home, with lodges added to the ground.
And since their plans ARE in the public domain, we can bring you images of the former wireless telegraphy HQ without suffering the wrath of the MoD!
1. Secret listening station to become new home
Inside the former listening station - the building has been empty since the 1980s
2. Secret listening station to become new home
Looking across the rooftop of the listening station which was built in the 1940s
3. Secret listening station to become new home
The listening station was kept securely behind high wire fences
4. Secret listening station to become new home
The decay is evident on the side of the building