4S-043-014 GWR 43xx 2-6-0 Mogul 5377 BR Black Early Crest Steam LocomotiveIn 1906 Churchward fitted a more powerful Standard No. 4 boiler to his successful 3100 Class 2 6 2T to create the GWR 3150 Class. The 3150s proved themselves to be capable locomotives but their weight and water capacity meant that they were typically restricted to suburban passenger traffic. Churchward was looking forward to the replacement of various of his predecessors 4 4 0 and 0 6 0 goods engines. In 1911 the draughtsman Harry Holcroft was