I agree with helicopter-redeye
Be very careful and you will need a great lookout, I knew the crew of a Jetranger who were killed at Farelton, near Kendal when they were hit by an RAF Tornado. Apparently the Tornado felt a bump and carried on, it severed the tail and boom of the Jetranger ! I have flown down the M6 motorway corridor many times and encountered lots of low flying military aircraft.
Enjoy the wonderful scenery and keep safe !