We must be living under a civilian airline route as well as the military activity that we get at lower levels. When the really clear weather arrives we can see their vapour trails at what must be over 36,000 feet. This one was taken as dawn was breaking.
If any of them feel a little lost it couldn't be simpler, you don't need all those fancy charts, dividers, pencils and computers. Just throw them out the window.
So here are the instructions.
Turn right two hundred yards after the transformer and straight on. The first land you see after crossing the water is The Netherlands. No worries.
Next time you're passing overhead just parachute a case of their lovely beer and some Matjes Herring down to us.