Updated 17th September 2000
A single choked shaft sprayed 168 and also marked with a green "M4 SEAD"
in green paint.
References: anon., 1980a (logbook); Corrin J S and Smith P, 1981; anon., 1990b (logbook); anon., 1992b (logbook); anon., 2000c (Summer logbook)
Entrance picture : yes
Underground picture(s):
Detailed Survey :
Line Survey :
On area survey :
Survex file :