Powys topographic maps

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In 1987 Bernard Wright, a rambler from Cheshire, was standing on Cadair Berwyn North Top (then said to be the highest mountain in Clwyd) when he noticed that a nearby peak appeared to be higher. After first denying it, the cartographers at the Ordnance Survey finally admitted that Bernard had discovered a 'new…

Average elevation: 654 m

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By the end of the 19th-century there were serious water shortages in the western parts of the historic county of Monmouthshire. The area had seen a massive population increase as a result of the steel and coal industries but the supply of water to the area was complicated due to its high altitude. A site for a…

Average elevation: 619 m

The River Severn (Welsh: Afon Hafren, pronounced [ˈavɔn ˈhavrɛn]), at 220 miles (354 km) long, is the longest river in Great Britain. It is also the river with the most voluminous flow of water by far in all of England and Wales, with an average flow rate of 107 m3/s (3,800 cu ft/s) at Apperley,…

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