Mainline steam trains in Great Britain
The most famous steam locomotive operating on the British main line is the 1923 built "Flying Scotsman". After being taken into public ownership in 2004, following a decade long refit it returned to mainline service in 2016. The fastest steam locomotive ever built, the 1938 built "Mallard", was also certified for main line operation briefly in the 1980s.
Essendine railway station
The world speed record for steam locomotives at 125.88 mph was achieved on 3 July 1938 by LNER Class A4 4468 Mallard. Taking place on the slight downwards grade of Stoke Bank south of Grantham on the East Coast Main Line, the highest speed was recorded at milepost 90¼, between Little Bytham and Essendine. It broke the German (DRG Class 05) 002's 1936 record of 124 mph (200.4 km/h).