4114 is a rebuilt GP9RM originally built in February 1959 (serial number A1650) by GMD in London. In late 1984 it was rebuilt and renumbered to 4114. It is classed as GR-418d.

4114 was the trailing unit in train 421 on Saturday April 26th, 2008. The train is on track 1, which does not serve Hamilton, because it has pulled ahead so that it can retrieve a cut of cars from Aldershot Yard. When the train departed some time later on track 2 it was loaded to 118 cars.