No Beags, the Pumas have been flying in and landing on quite regularly - both day and night. I can't vouch for the army vehicle type - but some kind of wheeled armoured job. Apparently a Lord Rothchild owns the land and once a year (on Palm Sunday I think) the villagers are granted rights of access through the centre of the forest. This year they discovered that some of the ornamental lakes in the grounds had been filled in and new buildings were being erected. Of course, providing the owner has planning permission he can do what he wants on his own land, but many local people are extremely concerned about the environmental impact to the area.
Yes, some of the locals are probably starting to imagine an X-Files type scenario - construction of the new Area 51 anyone? But in all seriousness, I don't think it would do any harm to consult with local residents before starting on large scale works involving considerable low-level rotary activities over an extended period of time.