BJCC wrote
Those peace loving people from an Island not far from the West Coast dug a big hole and filled it will mortar tubes, right next to where the spotters congregate. The result, spotters didn't notice.
Apparently neither did PLOD!!
The mortar episode wasn't the first go at LHR, and in none of the previous attacks (Car bombs in car parks as I recall)
See above
I am not a spotter just a guy from
an Island not far from the West Coast
and we were on quite a serious "terror watch" on a daily basis.