London, Midland and Scottish Railway (LMS) Stanier Class 5 4-6-0 No. 5110 (British Railways No. 45110) is a preserved British steam locomotive. It has carried the name RAF Biggin Hill in preservation, though it never carried this in service. Number 5110 was built in 1935 by the Vulcan Foundry. It was built with a low-degree superheat domeless boiler and still carries a domeless boiler. Fifteen Guinea Special The locomotive was one of three members of the class to haul the Fifteen Guinea Special, British Rail's last steam-hauled passenger train, on 11 August 1968. It took the first leg from Liverpool Lime Street to Manchester Victoria at the beginning of the tour before running from Manchester Victoria to Liverpool Lime Street with the returning train at the end of the day's tour. This locomotive was used in place of sister engine 45305, which had been selected for this duty, but had been failed with a collapsed firebox brick arch the night before the run, and had been withdrawn prematurely as a result. Use in preservation After hauling the Fifteen Guinea Special, 45110 was purchased straight from service for preservation by David Porter of the "Flairavia Flying Club" at Biggin Hill Airport. It moved temporarily to the former Ashford shed where it was named RAF Biggin Hall, and then to the Severn Valley Railway (SVR) in 1970; it was subsequently bought by the SVR in 1974, and has since been based at the line's locomotive depots at Bridgnorth and Bewdley. Between 1994 and 1998, when the engine itself was undergoing a major overhaul at Bridgnorth, 45110's tender was used behind LMS Stanier Mogul 42968 (then in LMS livery as 2968), whilst its own Fowler tender had a twisted frame problem ironed out. Following a return to service on 11 August 1998, the engine was main line registered, and did haul several main line steam specials on the national rail network, but after failing twice on a railtour to Stranraer in May 2000, the engine was confined to heritage rail operation only. It was hoped to have run 45110 on the 2008 recreation of the Fifteen Guinea Special, but this was not possible as the engine was due to come out of ticket on 11 August, the same day as the Fifteen Guinea Special re-run, and so a competition was offered by Steam Railway magazine to drive the engine on 11 August. Despite