Planet killer: Ex-army officer's Welsh space-rock mission
Tunguska, Chelyabinsk... Powys Geek's Guide to Britain As I approach the Wales-England border, the rolling Herefordshire countryside sharpens into steep hills and narrow valleys. Powys is a county covering a quarter of Wales, but it is home to just 133,000 people, making it the least densely populated area of Britain south of the North Yorkshire moors."