Sailor and writer Tom Cunliffe takes a voyage through the history of British seafaring and puts some of the vessels featured in the programme through their paces.

Looking more like a skip and than a boat the LCVP, or Landing Craft Vehicle and Personnel, isn't going to win any prizes for beauty. Yet this one boat did more to win World War Two than any other piece of machinery. There were once over 20,000 of these little boats, but today only a handful remain. Sailor and writer Tom Cunliffe puts one of them through its paces and finds out how this boat was developed for that one momentous day in 1944.