Class 46

Final development of the 'Peak' design, this time incorporating Brush electrical equipment. A further twenty machines of this type were envisaged, the order was however changed, and the locomotives emerged as the first Class 47's, D1500 - D1519.

Engine: Sulzer 12LDA28-B of 2500bhp

Numbers: 46 001 - 46 056

Previous No. Series: D138 - D193