In October 1991 at the ELR annual diesel gala, Harry Needle, with his then owned Class 25, (25262) placed his locomotive in the centre of the two units. The units were through wired to have the diesel in the middle and the capability to be driven from both ends of the units in a push pull mode. This was a major success for the October diesel gala, and pointed numerous possibilities to the future for having two units. This weekend saw a Class 504 Unit running north of Bury station for the first time.