}}Sir William Stanier was succeeded as CME of the LMS by C E Fairburn in 1944 and H G Ivatt in 1945. Although neither produced any new carriage designs, they did implement some of Stanier’s style changes. Among those was the port-hole stock, echoing that used by the 1938 streamliners. Following nationalisation in January 1948, BR continued to build LMS style carriages into the early 1950s.
==Service==Corridor Composite (CK) 24617 was built at Derby in June 1950, as lot number 1500 to diagram 2159. <ref>[[Bibliography#Other References|Jenkinson & Essery (1977)]] p. 110.</ref> The steel framing and all-welded construction gives a slightly more rounded profile than the earlier timber-framed stock. It has four First class and three Third class compartments, with a lavatory at each end. It served on BR’s Western Region until 1968, when it was declared surplus to requirements by BR at Didcot only weeks after a full works overhaul.
==Preservation==24617 arrived on the SVR from Didcot on 28 August 1968with several other vehicles. Former owning group the ‘LMS & BR Coach Fund’ donated all its vehicles to [[Severn Valley Railway Charitable Trust Ltd | The SVR Charitable Trust]] in 2007. The Trust’s web site notes that 24617 has run in SVR service every season since 1968. It forms part of [[Carriages#Set_L|the LMS Maroon set (Set L)]], notwithstanding that it was not built until after nationalisation. 24617 was the carriage that Richard Hannay (Robert Powell) boarded at the start of the railway scenes in the 1978 film [[The Thirty Nine Steps]]. 24617 and the other carriages from the LMS set used in filming were given 'Midland Railway' decals as the film was set in 1914, although the number W24617M, a BR era number for an ex-LMS carriage allocated to the BR Western Region, was left unaltered.