}}21254 is a BR Mk 1 Brake Corridor Composite (BCK) carriage, having two first class and three second class compartments as well as a small guard's compartment. Only 276 of this type were built; they were often used on overnight sleeper trains.<ref name=StockBook>SVR Stock Book 9th Edition</ref>
21254 was built at Derby in 1963 to diagram number 171 lot number 30731.<ref>Railway Heritage Register Carriage Survey</ref> Prior to withdrawal from service in 1981 it was noted in use on the "Night Scotsman" services into Kings Cross. ==21254 in preservation==It arrived on the SVR in August of that year1981, having been purchased by a trustee of [[The Erlestoke Manor Fund]].<ref name=StockBook/> In May 2017 it was undergoing restoration with all 10 doors, including locks, serviced, plus a full repaint.<ref>SVR 'Branch Lines' e-newsletter May 2017</ref>
It was photographed in March 2015 as part of the BR Maroon set.