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Virgin Trains East Coast (at the time) Class 91 109 "Sir Bobby Robson" waits on Platform 5 at York station, under the impressive station roof whilst working a service from Kings Cross station in London to Newcastle.
These locomotives work in a push - pull formation with MK4 coaches, with a DVT (Driving Van Trailer) up and down the ECML up to speeds of 125MPH (200kph). Until recently 31 of these locomotives operated, until the introduction of the Azuma units (class 800, 801 and 802). However 10 still remain in service, for now anyway.

More info for anyone who is interested here - https://en.wikipedia.org/wiki/British_Rail_Class_91
https://en.wikipedia.org/wiki/British_Rail_Mark_4