In this episode Dr Sam Willis explores the troubling history of safety at sea. In the eighteenth century seafaring was a very dangerous business indeed: not only were navigation and safety systems limited but unscrupulous owners of merchant ships would deliberately send ships to sea over-laden, but with enormous insurance raised on the vessel. These became known as ‘Coffin Ships’. To make matters worse, sailors who had signed up for a voyage but then refused to sail in such vessels could be sent to prison. Appalled by such public flouting of responsibility one man - Samuel Plimsoll - took it upon himself to reform safety at sea, taking on the entire maritime establishment. Plimsoll eventually succeeded, but only after numerous knock-backs from politicians in the grip of maritime merchant interest. His solution to the problem, the ‘Plimsoll Line’ - being a safe load-line marked on the hull of a ship - changed seafaring forever and also marked a significant moment in popular democracy when the will of the British public – in this case for the protection of their mariners – was heard. To find out more, Sam speaks with Nicolette Jones, author of the multiple-award winning book ‘The Plimsoll Sensation: The Great Campaign to Save Lives at Sea.’