Having spent the afternoon strimming and generally grass cutting I am reminded of an anecdote in RV Jones’ book Most Secret War concerning the Biting Raid.
In the quest for information on the German navigation beam Wurzburg a commando raid took place to capture on of the installations. (The raid is well written up at http://www.combinedo...m/Bruneval.htm.) The raid was reasonably successful, but had an huge unforeseen benefit. Up to the raid the radar sites, being quite small and unfenced, were difficult to find. After the raid the Germans fenced them all off and the resulting vegetation growing under the fence made them easily spotted.