Heddon Hall is a Hunslet Diesel Hydraulic locomotive. When acquired in 2005 by the L&B it was 2’6" gauge. Following a major overhaul including regauging, it entered service on the railway at the end of 2005. The loco was used in the later part of work on the extension to Killington Lane, being well suited for work with the ballast hopper and heavy works trains.

During Autumn 2007, Heddon Hall has been given a full engine overhaul and the exhaust has now been modified to vent through a bonnet-mounted exhaust pipe. The loco is currently available for service, however the modifications will not be cosmetically complete until early in the 2008 season.