‘A gesture towards nature’: call for Dartmoor’s temperate rainforest to double in size

Campaign comes as Duchy of Cornwall announces plan to expand small pockets of ancient woodland at two sites

Along a steep-sided valley, with the West Okement River roaring at its floor, the woodland emerges like an oasis in a closely grazed bare landscape.

Squat, tightly clustered, with root systems heavily covered in thick lichens and mosses, the oak trees of Black-a-Tor copse are a tiny surviving cluster of European temperate rainforest dating back to the bronze age.