Comedian, actor and outdoor enthusiast Ardal O'Hanlon explores the UK to discover its most remarkable trees. There are a staggering 50 trees to every person in Britain, and many have a history and heritage worth celebrating. In 2016, for the first time on television, Channel 4 reveals the winners of the Woodland Trust's prestigious Tree of the Year award. The public have voted on a 28-strong shortlist, selected by some of the country's leading botanists, historians and photographers. The winning tree from England, Northern Ireland, Scotland and Wales is put to a panel of experts, who will select just one of the four to take the overall title of UK Tree of the Year.