Fifty Class 50 Diesel-Electric 100MPH Type 5 Co-Co Locomotives were built at English Electric between 1967-68. They were withdrawn by 1994.
Class 50/0 - The main locomotive class
Class 50/1 - In 1987 50049 was regeared to lower top speed (80MPH) with higher traction effort, the trial was not continued and the locomotive was returned to standard configuration
