New research suggests there could be as many as two million ancient and veteran trees in England — ten times as many as previously thought. Researchers at the University of Nottingham experimented with mathematical models to map the likely location of ancient trees across England and volunteers conducted field visits to follow up. An ancient tree is one that shows exceptional age in relation to other trees of the same species. The research builds on work carried out by the Woodland Trust, Ancient Tree Forum and the Tree Register, which has mapped 180,000 trees. “These astonishing trees are our inheritance from history, and we should be treating them like national treasures,” says Adam Carmack of the Woodland Trust, which urged they be protected.