The S15 Class was introduced by Robert Urie for the London & South Western Railway in 1920 for use on heavy express goods trains. These locomotives continued to be built by the Southern Railway under Richard Maunsell after the 1923 Grouping, with a revised front end and cab design. No. 836 was built at the SR’s Eastleigh Works in 1927, going new to Feltham shed in the December, painted plain black with sunshine lettering on its six-wheel tender. Other than spells at Brighton and New Cross Gate, Lewisham, it was always a Feltham engine and was withdrawn from there in August 1964 as BR No. 30836 and cut up at Cashmore’s in Newport by October the same year.