A class 45/1 Diesel Electric Locomotive. This locomotive is owned by The Cotswold Mainline Diesel Group and is a permanent resident on the GWR. It first ran in preservation during the 2013 Heritage Diesel Weekend.
- Wheel arrangement: 1Co-Co1
- Origin: British Railways. Sulzer type 4 Diesel Electric Locomotive built by British Rail at Crewe in 1961.
- Engine/power: Sulzer 12LDA28-B, turbo-charged and intercooled, producing 2500hp at 750rpm. Power equipment by Crompton Parkinson (ETH equipment by Brush).
- Length over buffers: 67ft. 11in. (20.7m)
- Working weight: 135 tons
- Maximum speed: 90 mph