In the post-
privatisation era, the typical manner in which mainline steam trains are operated is for a promoter or customer to contract a charter
train operating company (TOC) to run it on their behalf. The TOCs are the legal entities which are licensed to operate trains; they are responsible for providing the three-man professional train crew consisting of the
engine driver,
fireman and
traction inspector, and negotiating access to the network from Network Rail. Locomotives and coaching stock will ordinarily be hired by the TOC on an as needed basis (known as spot-hire), although some stock is owned by the TOCs directly. As of 2013, only two charter TOCs were licensed for steam operation –
DB Schenker and
West Coast Railways. Of the 410,000 miles of charter train operation in 2012/13, 103,000 of this was steam hauled. Due to their unique aspects, the safe operation of steam locomotives on the mainline is governed by its own
Railway Group Standard, Steam Locomotive Operation, in addition to all other applicable standards. Depending on wheel diameter, locomotives on the mainline are permitted to operate up to maximum speeds ranging from 35 to 75 mph With
water troughs having been removed after the withdrawal of mainline steam, trains must now stop for water, being refilled via hoses from road going tankers (preferred over static hydrants due to pressure inconsistencies and the possibility of contamination), although mainline water cranes do still exist in some places. Additionally, water scoops in the tender are also required to be removed as well. adjust the coal distribution while the tender is refilled with water by hose With the locomotives often away from their home base, or even any kind of operating base, support crews numbering around half a dozen people usually travel with the train, their role being to prepare the locomotive, tend to it on water stops and repair any fixable issues arising, and clear the ashpan as part of a disposal routine at the end of the day. As a result, as well as the passenger coaches, mainline steam trains will also feature a support coach, normally a
passenger brake van of the
British Railways Mark 1 or
Mark 2 era, specially fitted out to provide seating/sleeping, catering and workshop facilities for the support crew, plus space to carry spares and equipment (i.e. hoses), including that required for the modern equipment needed on a mainline equipped train. While on the move, one support crew member rides on the footplate, to act as the locomotive owner's representative and assist the train crew – who have general knowledge of steam locomotives and the UK mainline – by offering specialist knowledge of the idiosyncrasies of the specific locomotive, and reacting to matters arising. On the move, the remaining crew in the support coach will also record the locomotive's performance while operating, including punctuality and fuel efficiency. == Locomotives ==