1 August 2003. One of the Eyeball series.
Source of photos and maps: http://www.multimap.co.uk/

Information on this facility from David Wood's thesis on transnational SIGINT, Appendix 2, Intelligence Sites in the UK:

http://www.staff.ncl.ac.uk/d.f.j.wood/thesis_app2.htm

RAF Digby

Controlling Authority / units present

339 Signals Unit
No.591 Signals Unit
(GCHQ)
(NSA)
(INSCOM 6950th Electronic Security Group)

Purpose

‘Signals Units, Aerial Erectors School’
(Main UK RAF SIGINT site)
(SIGINT intercept station)

Eyeballing the RAF Digby Intelligence Station