Jump in an RAF Hawk and see the entire coast of England, Scotland and Wales in half an hour flat. An apparent flying speed five times that of Concorde! David Bellamy in the Wash solves the mystery of King John's baggage. Clay Jones in Cardigan Bay delves into an ancient kingdom engulfed by the sea. And Patrick Moore reveals what's buried beneath Beachy Head. While we whizz around our extraordinary coastline, 21 regional accents explain every twist and turn, in a first non-stop view of our proud and ever-changing shores.