LNER Class B1 may refer to two different type of steam locomotive operated by the London and North Eastern Railway:
- GCR Class 8C, two locomotives originally classified as B1 but reclassified as B18 in April 1943 to allow the B1 classification to be used for the LNER Thompson Class B1
- LNER Thompson Class B1
This article includes a list of locomotives with the same or similar names. If an internal link for a specific locomotive led you here, you may wish to change the link to point directly to the intended locomotive article, if one exists.