Our article ‘Push-pull operation by the LNER and its British Railways’ successors’ (Steam Days, March 2023) primarily dealt with the routes and coaching stock, so we now consider the motive power, which amounted to more than 100 locomotives. Naturally, the movement of these tended to follow where push-pull services operated, but that did not mean that they did not operate conventional trains at times, especially where a pool of fitted locomotives was available. This account covers a dozen different classes of London & North Eastern Railway or LNER ‘group’ origin – Great Central, Great Eastern, Great Northern, North British, and North Eastern Railway, but it also considers locomotive types that saw use on the three British Railways’ regions with LNER heritage: Eastern, North Eastern and Scottish. Within the latter account…