The London and North Eastern Railway (LNER) produced several classes of locomotive, mostly to the designs of Nigel Gresley, characterised by a three-cylinder layout with a parallel boiler and round-topped firebox. It produced the most famous locomotive of its day, 4468 'Mallard', the holder of the world steam locomotive speed record. It also built the world-famous 4472 'Flying Scotsman'. However, its locomotive inheritance was much greater than just the 'A4 Class', it also produced highly successful mixed-traffic and freight designs. For an explanation of the classification and numbering systems used by the LNER and its constituent companies, see: LNER locomotive numbering and classification. Locomotives of constituent companies Great Central Railway Including the Manchester, Sheffield and Lincolnshire Railway Richard Peacock (1846–1854) W. G. Craig (1854–1859) Charles Sacré (1859–1886) Thomas Parker (1886–1893) Harry Pollitt (1893–1900) John G. Robinson (1900–22) see John G. Robinson There were also 3 steam rail cars built in 1904–1905. These were withdrawn in 1914. Lancashire, Derbyshire and East Coast Railway The Lancashire, Derbyshire and East Coast Railway was absorbed by the Great Central Railway on 1 January 1907. All LD&ECR locomotives were built by Kitson & Co. Great Eastern Railway Great North of Scotland Railway In 1923 the Great North of Scotland Railway passed on a total of 122 locomotives, 100 4-4-0 tender locomotives and 22 tank engines, all capable of being used on either passenger or goods trains, to the LNER. Great Northern Railway Hull and Barnsley Railway From its formal establishment in 1885 to the time that it was taken over by the North Eastern Railway (NER) in 1922, the CME of the H&BR was Matthew Stirling, who, like his father and uncle, built locomotives with domeless boilers. Metropolitan Railway Three classes (the G, H and K Classes) were taken into LNER stock on 1 November 1937. The other former Metropolitan locomotives were retained by London Transport, which had acquired all of them at its formation on 1 July 1933. Midland and Great Northern Joint Railway M&GN locomotives were taken into LNER stock on 1 October 1936. North British Railway North Eastern Railway Locomotives built by the LNER Gresley designs Thompson designs Peppercorn designs Another A1, "Tornado" has been built by subscription among LNER (and other) locomotive enthusiasts, and came into service in 2008. In total it cost £3 million. Again under the chairmanship of Mark Allatt, the team is (2014) now raising funds most successfully