Some peaks that are just a few centimetres above minimum height face being downgraded amid advancing seas Rising sea levels could topple the proud status of some British mountains, reducing them to the status of mere hills. Those in greatest danger of demotion include a peak in the Yorkshire Dales that was only reclassified as a mountain a few weeks ago. The Ordnance Survey (OS) uses mean sea level as the starting point for measuring the absolute height of mountains, which must be a at least 609...
Some peaks that are just a few centimetres above minimum height face being downgraded amid advancing seas Rising sea levels could topple the proud status of some British mountains, reducing them to the status of mere hills. Those in greatest danger of demotion include a peak in the Yorkshire Dales that was only reclassified as a mountain a few weeks ago. The Ordnance Survey (OS) uses mean sea level as the starting point for measuring the absolute height of mountains, which must be a at least 609...
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