Malcolm Fergusson talked about the Ultra secret (the WWII German communications decoded at Bletchley Park) and the SCU-3 (Special Communications Unit) located in 1940 at Cockburn Farm near Balerno (where he lives). Attendance was a great 26, including Zoom.  Click for slides.

Malcolm is a retired Superintendent Technician, Physics & Electrical Engineering, at Edinburgh University & an Honorary Life Member of the Museum of Communication.

Cockburn Farm, Balerno.