British trees are struggling to survive in heatwaves. Forests like these are likely to be affected. Billy Stock/Shutterstock If you visit the Royal Botanic Gardens at Kew, on the edge of London, you will see a brightly painted skeleton of a dead oak tree. The tree, known as the climate changed oak, succumbed in the heatwave of 2022. Instead of removing it, Kew left it in place as a reminder that climate change is already taking its toll on Britain’s trees. The 2022 heatwave killed 400 of Kew’s t