Thompson’s B1sThompsons B1s 25. 00 The B1 Class 4 6 0 locomotive was Edward Thompsons most enduring design. Built from 1942 1952, the class totalled 410 examples and was a familiar sight across former London & North Eastern Railway territory. Thompsons B1s presents many of the engines at work in the LNER and BR periods through 230 excellent colour and black and white images. The locomotives are pictured at locations such as: York, Newcastle, Darlington, Doncaster,