May 1940: Hitler's forces were poised to conquer Europe. A small and dedicated band of British families entrusted with the upkeep of First World War graves in Belgium are given 24 hours to leave and make theirwayto the coast. Brian James talks to the survivors of what proved to be an epic journey as they set off in seven old cars, an ancient 20-seater bus, on bicycle and on foot, keepingjust one step ahead of the invading German army. Producer Angela Hind