LNER Thompson O1

The LNER Thompson O1 designation in this database refers to Edward Thompson's rebuilds of inherited GCR 2-8-0 locomotives, which are covered in full in the LNER O1 Class entry. See that entry for the complete design history, the relationship to the original GCR Class 8K (ROD) 2-8-0s, the 58 rebuilds Thompson carried out in 1944–46, and the preservation status (the original O4 design is represented by No. 63601 at the Great Central Railway, Loughborough).