GCR Class 9K
 The Great Central Railway 9K and 9L classes were two related classes of 4-4-2T Atlantic steam locomotives. They were both intended for suburban passenger services. After the 1923 Grouping they served the LNER as classes C13 and C14.Their designer was John G. Robinson. The design was based on the earlier Pollitt Class 9G 2-4-2T locomotives but with a lengthened boiler and a leading bogie to carry it.