This afternoon I was over at the base of Pen Y Fan (not to climb just to take some piccies) and again wondered what the brick built structure was/is at the start of the trail. I am sure that everyone who has made the ascent form the car park side has seen this, its half buried in the hillside and has the appearance of a WW2 “pill box” although its not the traditional round shape of the ones that dot the eastern countryside. A quick Google revealed nothing and James, M0ZZO suggested that the reflector might be the place to ask!
Thanks in advance!
David
M0ZLB