Built by John Fowler & Co in 1945, 3900002 was supplied new to Halifax Gas Works. It was initially named ‘Alderman J. H. Waddington J.P.’ but was later renamed ‘Alderman W. Regan J.P.’. 

In September 1961 it was moved to Keighley Gas Works where it would remain until rail traffic in September 1966. It was then sold to scrap traders W. H. Arnott Young & Co Ltd. Shortly after, it was sold to George Cohen, Sons and Co Ltd and moved to their yard in Stanningley. 

With a clear need for another diesel locomotive to act as a standby for ‘John Alcock’, Middleton purchased 3900002 as it was found to be in reasonable condition. Following the purchase, it arrived at the railway in December 1967.