ANTHONY SAYER is a life-long railway enthusiast with an interest in the history of the early British diesel and electric locomotive classes. This is the author’s sixth book in the “Locomotive Portfolio” series, following on from the North British Type 2 (Classes 21 & 29), the Metropolitan-Vickers Type 2 (Class 28), the Clayton Type 1 (Class 17), the BTH/NBL Type 1 (Classes 15 & 16) and BR Swindon Type 1 (Class 14: Their Life on British Railways) books published between 2019 and 2021. Anthony lives in the north-east of England and has now retired after 37 years in the steel industry with responsibilities in both transport planning and supply-chain logistics.