Life's a beach, especially when it's your job to look after eight miles of coastline. As senior foreshore inspector Rob Dove knows the stretch of shingle from Worthing to Shoreham like the back of his hand. He shares a few explosive stories while talking to Neil Pringle on a beachcomb in Lancing before they are joined by Alice Tebb, of the Marine Conservation Society, to discuss killer substances which are hiding in the pebbles...