Two batches of air braked dry fly ash Presflo were introduced, both numbering 104 wagons. Note that the 12ft. 6in, is taken from diagrams (and 3810 mm is on CS002C) and it is almost certainly correct (see note on Vacuum braked dryfly ash wagons), but most wagons appear to be branded with a 12ft wb (3657.6 mm). A scale drawing of a CSA is in Monk-Steel, David (2011) Merry-go-round on the rails. HMRS publishing, Butterley Station, Derbys. 196 pages ISBN 978-0-902835-30-6.
