LNER Thompson Class B1: 1264

The London and North Eastern Railway (LNER) Thompson Class B1 is a class of steam locomotive designed by Edward Thompson for medium mixed traffic work.

It was the LNER's equivalent to the highly successful GWR Hall Class and the LMS Stanier Black Five, two-cylinder mixed traffic 4-6-0s. However, it had the additional requirement of having to be cheap because, due to wartime and post-war economies, the LNER, never the richest railway company, had to make savings.