Our new map reveals the effects of 20th century land-use and climate change on Britain's wild species

Under the stewardship of geographer Sir Dudley Stamp, thousands of volunteers (including many schoolchildren) came together in the 1930s on a mission that sounds relatively simple on paper: to record how British land was being used.

Equipped with an Ordnance Survey map, a clipboard and a pencil, these volunteers recorded information that collectively formed the earliest spatial record of where and how the British people were…

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