Originally Posted by Dale
I took some photos of this mystery third fence a couple of months ago.
Although they are already in the main Harrington Airfield thread they are pertinent to repeat here.
Traces of the Thor site perimeter fencing where it crossed the western peritrack. Mine markers used to denote the post holes:
"Outer fence No.1", a single row of the 8" square concrete posts:
When plotted into Google Earth, with the 1970s OS map overlaid, this single-row fence lines up with the continuous outer fence marked on the map, and is 260'
outside the visible line of the inner perimeter fence.
"Outer fence No.2", a staggered double row of the same 8" square concrete posts, 4' between rows, about 40' feet inside "Outer fence No.1", with the usual stubs of the metal reinforcing rods: