The Chester and Holyhead Railway and the Denbigh and Wrexham Railway both run local passenger trains throughout their lines.  As such, it was little surprise the designers at May Traction and Railworks recieved orders from both railways for modern suburban services following the war. The resulting the engine would be classifed as the Class 20 by the C&HR, with little differences between the two railways engines. A 2-6-2 tank engines, utilizing one of the standard boilers devloped for the Denbigh and Wrexham, the engines quickly proved a reliable and agile, quickly finding work on branchline frieghts as well as their  intended suburan passenger services.

Mason County Logging Co. #7 at Niles Canyon Railway's Steamfest 2014.  Long exposures are fun.