ABB/Adtranz (now Bombardier) built the 4-car 100 mile/h 'Networker Express' class 365's at York between 1994 and 1997 and the Commissioning group were involved with the initial test running from York on the ECML as Railtest had an embryo Railway Safety Case for operating test trains at the time.
The trains were equipped with 3rd rail shoes and pantographs and could therefore operate on either AC or DC systems
When York closed the operation moved south to Doncaster.
The test runs were usually planned to turn round at Peterborough and were accompanied by staff from ABB/Adtranz.
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More will be added as time permits