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The following are the locomotives you are likely to see during a visit to the railway:

Conway Castle

A bogie diesel hydraulic locomotive, built as one of three identical locomotives in 1972 by Fenlow Engineering.  She and a sister locomotive originally ran on a railway at Prestatyn beach, before moving to the Suffolk Wildlife Park (via Staffordshire) in the early 1980s.  When the wildlife park closed their railway in the early 1990s, she moved to Watford and has been in regular use ever since.

Current Status: In use

Nikki Louise

An 0-6-0 diesel hydraulic locomotive, Nikki Louise was built brand new by R. Prime for the Suffolk Wildlife Park in 1988.  When this railway closed she moved to Watford with Conway Castle, where she was subject to an extensive rebuild before coming into use in the late 1990s.

Current Status: In use

Thomas Poole

An 0-6-0 steam outline petrol hydrostatic locomotive, originally built in 2006 by Roanoke Engineering in North Devon.  She was built brand new for the Poole Park Railway in Dorset, and was used there until 2011, when she was sold for use at Watford.

Current Status: In use


A 2-4-2 diesel hydraulic locomotive, originally built as a petrol locomotive by Bruce Whalley for a private railway in Somerset.  Following use on a number of private railways in the West Country, Bree was taken to our workshops for a thorough rebuild to suit use at Watford.

Current Status: Undergoing rebuild