This video from oorail.com looks at the Heljan Class 23 'Baby Deltic' D5905 with small yellow ends and factory weathering. Only ten Class 23 locomotives were produced in 1959, and remained in service despite technical problems until 1971. With a top speed of 75 mph this smaller Bo-Bo version of the Class 55 Deltic was primarily used for passenger services on Kings Cross outer suburban services. This video features the usual review, background information on the loco and the class, as well as speed testing and close up views on the layout.