On the French channel coast Nick Crane explores life on the incredible outcrop of Mont St Michel, home to monks living an elevated ecclesiastical life high in a hilltop monastery that attracts a million tourists a year. Nick also investigates the network of remarkable seaforts that kept the port of St Malo safe from raids by the Royal Navy. Mark Horton reveals how two centuries ago when the French mapped the exact distance across the Channel it led to the birth of Britain's Ordnance Survey and the maps we use today. Miranda Krestovnikoff is on patrol with the Royal Navy who police the fishing boats which compete in the Channel.
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