'Sudden oak death arrived in Britain from America, where it decimated the oak population, just under a decade ago via imported plants. In Britain the disease, officially known as phytophthora ramorum, spared oaks and jumped to rhododendrons and Japanese larch trees. In the last year it has taken hold along the west of the country in larch plantations, including more than 120 Forestry Commission sites, 20 National Trust properties and two Woodland Trust reserves. Already 4 million trees have been felled or marked for destruction...Read more: