From ash die-back to the Great Storm of 1987 to Dutch elm disease, our much-loved woodlands seem to be under constant threat from a procession of natural challenges. Just when we need trees most, to help combat global warming and to provide places of retreat for us and our wildlife, they seem at gre...

From ash die-back to the Great Storm of 1987 to Dutch elm disease, our much-loved woodlands seem to be under constant threat from a procession of natural challenges. Just when we need trees most, to help combat global warming and to provide places of retreat for us and our wildlife, they seem at greatest peril.