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!
. Secret listening station to become new home
The listening station was once a place where 120 people worked ... but many of their duties remain classified to this day Photo: na
. Secret listening station to become new home
Inside the former listening station - the building has been empty since the 1980s Photo: na
9. Secret listening station to become new home
Inside the new-look home which will transform the derelict building Photo: na
10. Secret listening station to become new home
The design plan approved by Fife Council this week Photo: na