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.
LNER Peppercorn Class A1 60163 Tornado
60163 "Tornado" is a main line coal-fired steam locomotive built in Darlington, County Durham, England. Completed in 2008, "Tornado" was the first such locomotive built in the United Kingdom since "Evening Star", the last steam locomotive built by British Railways in 1960. It is the only example of an LNER Peppercorn Class A1 locomotive in existence, the entirety of the original production batch having been scrapped without preservation. The locomotive's namesake is the Panavia Tornado, a combat aircraft flown by the Royal Air Force. In April 2017, "Tornado" became the first steam locomotive to officially reach 100 mph in over 50 years on British tracks.