When is an island not an island? Peter Caton takes us to all four corners of England, Scotland and Wales to find out.
Sharing our nation’s fascination with islands, Peter sets out to be the first person to visit all 43 tidal islands which can be walked to from the UK mainland. Along the way he faces many challenges: precipitous cliffs, vicious dogs, disappearing footpaths, lost bus drivers, fast tides, quicksand and enormous quantities of mud, but also experiences wonderfully scenic journeys by road, rail and on foot. He contrasts the friendly welcome from most islanders and owners with the reluctance of others to permit visits, and tells how he was thrown off one secret island.