A Detailed History of British Railways Standard Steam Locomotives: v. 2: 4-6-0 and 2-6-0 Classes by John Walford
At nationalisation half of the medium size mixed traffic fleet was over age with some very elderly. Riddle's team designed five 4-6-0 and 2-6-0 classes totalling 452 engines. John walford presents complete design data, modification details, livery, allocation and use for each engine in each class.