 Many had already failed on this mammoth challenge.The act to promote the new Rover Light Six in a headline-grabbing campaign was the brainchild of former motorcycle tester and pioneer publicist Dudley Noble, in which a Light Six was to race the Blue Train across France from Calais to St Raphael on the Côte d'Azur.It was a moderately shameless stunt of him, being safe in the knowledge that the average speed of the famous express was no more than about 40 mph once all its stops and detours were taken into account.