I just have a screenshot of this still from a video - I am away from home and my laptop today, so will work on stuff when I get home tomorrow.
Anyway, this is a GAMA - a GLCM Alert and Maintenance Area. GLCM stands for Ground Launched Cruise Missile. Location undisclosed.
Before anyone gets worried, some of you may remember during the 80s, there was controversy with USAF storing nuclear weapons at a couple of bases in the UK. There were demonstrations, and peace camps and under the Intermediate-Range Nuclear Forces Treaty (INF Treaty), the weapons were removed from UK soil. So this place, although still under the auspices of the MOD, is NOT going to get me in trouble. It wasn’t even a DJI NFZ.
Anyway, enjoy!