 From 1915 locos were not given a top coat and ran in French Grey undercoat but with the boiler bands picked out in black.After the amalgamation of the GER into the LNER in 1923 (the Grouping), the E4s received the LNER mixed traffic livery of black with single red lining and red buffer beams.This lasted until the early 1940s when unlined black with red buffer beams was introduced, and the surviving locos were to carry this livery until their withdrawal.