The elm, as depicted in the paintings of John Constable, is the quintessential British tree, but 30 years ago the species was almost wiped out by Dutch Elm Disease. Gardeners, ramblers, scientists and sculptors discuss how the loss of the majestic elm has affected the pattern and glory of the countryside. Will it ever return to our hedgerows? And why has Brighton been so successful in protecting the country's oldest elms from the disease?
Alan Titchmarsh on new shoots: page 44