The naturalist takes a wintry walk around the western corner of the Isle of Wight, where she holidayed as a girl. Starting on Yarmouth's wooden pier, her journey begins with a boat trip to the Needles, which her Victorian guidebook recommends as the best way to view these impressive chalk stacks.

Kate follows the iconic white cliffs of Dover on a 15-mile walk of contrasts. As well as overlooking the busiest shipping lane in the world, this route contains one of the world's rare rivers - a chalk stream flowing through the heart of Dover. Kate's walk begins above Folkestone Harbour at Martello Tower 3, built in the early 19th century to defend against a naval invasion by Napoleon.