British Rail Train-Crew Manual - Class 90
Locomotives - Drivers General Information, Driving Instructions,
Drivers Static Duties and Drivers Fault Finding Data.
Issue Date September 1988 - BR
33056/128 - Issue 1.
More information can be found here
Wikipedia - BR
Class 90
Information relating to privately owned AC Locomotives can be found
here -
The A C Loco Group &
Electric Traction Ltd.