Starting in 1898, Peter Drummond had eight 4-4-0 locomotives built by Dübs, which were intended for passenger and express service and had inside cylinders. They were named after Scottish mountains, all of which start with “Ben”. Nine more followed between 1899 and 1901 from the Highland Railway workshops at Lochgorm and another three were built by North British in 1906. These were soon called “Small Bens”, as from 1908 six locomotives with larger boilers were supplied by North British. The Small Bens and Large Bens had identical dimensions for the driving wheels and cylinders. In the LMS the Large Bens were phased out by 1937 and the Small Bens partially survived the early years of British Railways. 