Magnificent Mallard: World's fastest steam locomotive

Seventy five years ago a world record, still unmatched, was achieved by a steam engine called Mallard.

For just a couple of minutes the locomotive thundered along at speeds of 126 miles per hour on a stretch of track just south of Grantham.

To mark the occasion the engine will be reunited with five of its sister locomotives at the National Railway Museum in York, attracting enthusiasts from all over the world.

Danny Savage reports.