In the seven decades since the darkest moments of the Second World War it seems every tenebrous corner of the conflict has been laid bare, prodded & examined from every perspective of military & social history. But there is a story that has hitherto been largely overlooked. It is a tale of quiet heroism, a story of ordinary people who fought, with enormous self-sacrifice, not with tanks & guns, but with elbow grease & determination. It is the story of the British railways &, above all, the extraordinary men & women who kept them running from 1939 to 1945. Churchill himself certainly did not underestimate their importance to the wartime story when, in 1943, he praised `the unwavering courage & constant resourcefulness of railwaymen of all ranks in contributing so largely towards the final victory.` & what a story it is. The railway system during the Second World War was the lifeline of the nation, replacing vulnerable road transport & merchant shipping. The railways mobilised troops, transported munitions, evacuated children from cities & kept vital food supplies moving where other forms of transport failed. Railwaymen & women performed outstanding acts of heroism. Nearly 400 workers were killed at their posts & another 2, 400 injured in the line of duty. Another 3, 500 railwaymen & women died in action. The trains themselves played just as vital a role. The famous Flying Scotsman train delivered its passengers to safety after being pounded by German bombers & strafed with gunfire from the air. There were astonishing feats of engineering restoring tracks within hours & bridges & viaducts within days. Trains transported millions to & from work each day & sheltered them on underground platforms at night, a refuge from the bombs above. Without the railways, there would have been no Dunkirk evacuation & no D-Day. Michael Williams, author of the celebrated book On the Slow Train, has written an important & timely book using original research & over a hundred new personal interviews. This is their story.