The SECR used its standard 9ft 6in wheelbase steel underframe for a two-plank ballast wagon that was introduced in 1919. Some 120 were built over the next four years the last being completed by the Southern. These wagons were often seen in long rakes as they took ballast to wherever trackwork requiredattention. They were so useful that BR didn ôt finally get rid of the last ones until 1971 which made them some of the last pre-Grouping ve-hicles in operation in the Southern Region CCE ôs mainland fleet. Sadly no Dia. 1744 ballast wag-ons survived into preservation. However because they used the standard SECR underframe(as modelled on our five- and seven-plank open wagons) the Bluebell Railway has re-created one No. 567 using the chassis from a seven-plank open and original works drawings.