Yep! There's certainly a load of these sort of stories. Some of which are very likely true. Ages ago, when I was doing my Approach Radar course, one of my instructors had been based at Colerne in 1945 and told me that he had been involved in the burying of a number of Miles Masters on the airfield. Apparently the Royal Engineers had dug a very large pit with a slope into it from one side and the aircraft where taxied in and buried!
There was also the story as to what used to cause the magnetic anomolies at the 27 holding point at East Midlands. Some said buried aircraft parts, others possible buried ordenance. However, when the current runway extension was built nothing was found. It would be great if someone did find something at one of these sites though!
Spiney