Bob Davies is the railway's main standby diesel, used to haul out of season trains, for yard shunting and goods or works train haulage.
Our Baguley Drewery 0-4-0 loco was built in 1983 to 1 metre gauge for the Royal Navy line at Milford Haven, purchased by Pete Briddon's Yorkshire Engine Company and regauged to 2ft and named 'Bob Davies' in honour of a remarkable railway man, the loco was ultimately sold to the Bala Lake Railway Company.