A class 26 Diesel Electric Locomotive. This locomotive is owned by The Cotswold Mainline Diesel Group and is a permanent resident on the GWR. 26043 ran for the first time in preservation during the 2013 Heritage Diesel Weekend.
- Wheel arrangement: Bo-Bo
- Origin: Sulzer type 2 Diesel Electric Locomotive built by the Birmingham Railway Carriage & Wagon Company in 1959.
- Engine/power: Sulzer 6LDA28A, turbo-charged, producing 1160hp at 750rpm. Power equipment by Crompton Parkinson.
- Length over buffers: 50ft. 9in. (15.5m)
- Working weight: 75 tons
- Maximum speed: 80 mph