So.....
I'm out today, beating for a shoot that used to be local to me. We're having a lovely day, in the winter sunshine of a Buckinghamshire morning, when we hear a helicopter approaching. A Chinook passes over, at maybe 500 feet, so I look up to admire this wonder of engineering. Immediately, I notice that it has no roundels, markings or identification numbers - just plain black.
To cut a long story short, a very enjoyable day comes t an end, and we're all in the farmyard, wishing each other well, when we hear another helicopter approaching. Someone jokingly says "It's the police