A LNER 'Stanier' Class B10, is a 4-6-0 type of steam locomotive, which is practically a cross between a GNR/LNER Class A1 and a GNR C1 Atlantic, only with a curve in the running boards similar to an LNER Class A1/A3, and is modified to be a 4-6-0.

The locomotive itself was experimental, very few were built and the LNER B12 — its much more successful counter-part — was its replacement.

All have been scrapped, yet one B12 or B13, No. 8572, still exists, and is in the process of being preserved.