Secrets of the Coast episode three The Pebbled Shore is presented by broadcaster and naturalist Su Ingle and filmed at Chesil Beach and this excerpt is on Abbotsbury Swannery based on the Fleet Lagoon in Dorset. The unique natural wildlife habitat is one of the only places in the world where there is a public walk through a managed colony of nesting mute swans. Once a year the swans are rounded up during the moult when they are flightless to check on their health.