Class 154 - The experimental DMU
Class 154001 is 150002. The Sprinter fleet was slowly growing, with a brand new express Sprinter to join them, this is the class 158. These units were the first to have air conditioning, and to go at 90mph, instead of 75mph. 150002 was the test bed for the class 158s, the 3 car prototype Sprinter was fitted with an airconditoning system and was regeared to go at 90mph during 1986.The unit was renumbered to 154001 and lasted until 1987 where the unit was reconverted back to 150002.