Mallard anniversary: Steam locomotive Bittern marks record run

A 1937 steam locomotive has run along the section of track where a another locomotive set an unbeaten world record 75 years ago. Bittern, an A4-class engine, a contemporary of Mallard, the world's fastest steam locomotive, set off from King's Cross station for York. via Pocket http://www.bbc.co.uk/news/uk-england-23109971#sa-ns_mchannel=rss&ns_source=PublicRSS20-sa