A class 37/0 Diesel Electric Locomotive, is owned by four individuals who are both Growler Group members and active working members of the GWR diesel department and is a permanent resident on the GWR. 37248 came to Toddington in 2010 and has undergone an extensive refurbishment including the provision of steam heating and a return to BR green.
- Wheel arrangement: Co-Co
- Origin: English Electric type 3 locomotive built by English Electric at Newton-le-Willows in 1964.
- Engine/power: English Electric 12CSVT, Turbo-charged and Intercooled, 1750hp at 850rpm. Power equipment by English Electric.
- Length over buffers: 61ft. 6in. (18.75m)
- Working weight: 105 tons
- Maximum speed: 90 mph