Walked the north shore from Kielder Village down to Fallstone with a mate in the summer. Mind you, we went with the intention of hammocking at the half way mark. Kind of overstepped that a little as the morning leg only lasted about 40 minutes. It was about 10 miles, like your trek. I enjoyed it, but felt the route lacked diversity. The best bit by far was sitting around the camp fire with a few whiskeys and some bacon.