It was known as the Comet Line. It was the greatest escape route in the Resistance Movement and in its three years of life it saved over 800 airmen and soldiers from captivity, returning them safe to Britain. Andrée de Jongh, dubbed the 'Little Cyclone', was the young Belgian girl who created the route from Brussels to Bilbao. And there can have been few stories to match hers in terms of courage, inspiration and loyalty in the most appalling wartime conditions.