British Rail  - Type 2 Brush Traction Diesel Electric Locomotives Fitted With Mirrlees JVS12T 1250hp Or English Electric 12SVT 1470hp Engines.
Driving Instructions Including Standard Preparation and Disposal Duties - For Locomotives D5520 (31102) - D5699 (31269) and D5800 (31270) - onwards
Issue Date May 1965  -   BR 33003/79

More information can be found here Wikipedia - British Rail Class 31   A1A Locomotives Ltd
More Information Regarding Preserved Class 31 Locomotives can be found on the following websites:  Preserved-Diesels