<P> Since 2004, private tour operator Beyond Boundaries Travel has commissioned the train each summer for use on its Harry Potter Fan Trips tours of the United Kingdom . On 11 March 2007, vandals targeted the coaches, causing £ 75,000 worth of damage at West Coast Railway Company's depot in Carnforth . Ten youths, aged between twelve and fourteen years, were arrested in connection with the incident--in which 337 windows on several coaches were smashed . </P> <P> In the films, the locomotive is depicted pulling the "Hogwarts Express", a fictional train, made up of four (later five) British Rail Mark 1 carriages . Scenes were filmed at King's Cross railway station, the Glenfinnan Viaduct in Scotland and the North Yorkshire Moors Railway--along with internal scenes on board the train . </P> <P> When filmed, Olton Hall carried a "Hogwarts Express" headboard on the smokebox, featuring the Hogwarts school crest . The same emblem is featured as part of the "Hogwarts Railways" sigil on the tender and carriages . It retains its GWR number of 5972, but with alternative nameplates fitted, naming the engine Hogwarts Castle . It is painted in a crimson livery--a non-standard colour, as Great Western Railway locomotives traditionally used green . </P> <P> Olton Hall was not the first locomotive to be re-liveried to appear hauling the Hogwarts Express . To promote the fourth Harry Potter book, Harry Potter and the Goblet Of Fire, Southern Railway West Country Class locomotive 34027 Taw Valley was temporarily repainted and renamed . However, it was rejected by film director Chris Columbus as looking "too modern" for the film, but it carried the name and colour for some months afterwards . </P>

What is the number on the hogwarts express