The LNER 2-6-4 Tank Locomotives

For various reasons, the LNER did not have many 2-6-4T locomotives until Thompson introduced his L1 as a part of his standardisation plan. The LNER inherited 2-6-4Ts from the Great Central Railway and London Transport (ex-Metropolitan Railway), but never built any more of these designs. Gresley is thought to have seriously considered a passenger 2-6-4T design in the 1920s. After a number of serious derailments of similar locomotives on the Southern Railway, he amended the design to that of a 2-6-2T.