The Army ..sometimes firing huge guns ..at other times squaddies training ..not just the British Army either ..I've seen The Gurkhas ..and members of other NATO countries up there ..its very near to Otterburn Camp.What's in those danger areas?
It's pretty obvious where & when you stay clear as there are red flags flying and signs every so often warning of the danger of un-exploded shells leading to injury or death ..but hey it just adds a little more excitement to your ride ?