In May 1940, a Mark 1 Spitfire was shot down and crash-landed on a beach in northern France, where it slowly sank into the sand. The wreckage was finally recovered in the 1980s and stored in France for more than 20 years. In this programme, motorcycle racer and mechanic Guy Martin joins a two-year project to rebuild the aeroplane, revealing the engineering and skills involved, and providing a fitting homage to the bravery of everyone involved in its service