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The locomotive, No. 1991, was built in 1891 at Crewe Works using an extended version of Webb's Improved Precedent Class, but as a 2-6-0 Mogul. The main purpose of it was for mixed-traffic mainline duties and, on its first day of service, not only met expectations, but surpassed them greatly. 89 more were built between 1892 to 1902 most likely because of its popularity with crews and and enthusiasts, earning it the nickname 'Big Mike' as opposed to the 2-4-0 'Jumbos'. A handful of them worked along the Northampton to Birmingham lines while the rest were allocated to various parts of LNWR metals, except for Cumbria. Plans to build more locomotives of this class were considered but unfortunately fell through owing much to Webb's retirement and George Whale's succession in 1903. In 1923, the newly-established LMS railway company acquired a handful of these locomotives. Withdrawals finally took place until 1933 and continued until 1936. Fortunately, No. 1991, the class leader, survived into preservation and can be seen in its LMS crimson lake livery. Recently, in mid-to-late 2017, the locomotive was overhauled in time to commemorate the 100th Anniversary of the End of the First World War and to work on heritage lines in the UK.