A short distance south of 886m Pen y Fan, the highest peak in the Brecon Beacons (or Bannau Brycheiniog as they are now known), which I wrote about in May, is a range of peaks less well known to the outside world.

The Rhigos Hills form an escarpment on the northern side of an area of Wales known simply as The Valleys, a string of heavily populated parallel rifts running north to south through the upland terrain north of Cardiff. Throughout the 19th and 20th centuries the Valleys were a centre fo...