Over 200 of the Class 20 diesel-electric locomotive, also known as the English Electric Type 1, were built between 1957 and 1968, and the design was so successful that it's still in service to this day. The Class 20 Collection for RailWorks and Rail Simulator features several versions of the Class 20 locomotive ranging from the 1950s to the present, with each locomotive having a daytime cab and another for use at night with authentic night lighting.

Also included are the FEA-F RHTT (Rail Head Treatment Train) used to blast leaf mulch off the rails and the FNA Nuclear Flask carrier designed to transport spent nuclear fuel. 10 different liveries and 12 scenarios are included.

EXCLUSIVE: ActivTrain and ActivWagon - this smart coding technology (RailWorks only) allows the Class 20 engine to control the water spraying and sounds effects of the RHTT is also employed by the FNA and RHTT to provide an authentic red flashing tail lamp and let the engine headcode numbers and letters be changed.