A NoL set did venture north of York, but not under it's own power. It was hauled to Polmadie by two of Eurostar's 37s with match wagons, to commission the work done on the carriage cleaner which had been adapted to retract as each articulated bogie passed by - it worked. We also took the set into Glasgow Central to check signal sighting in the station, the set was propelled into the platform from the last signal before the station (the train left Polmadie with a 37 and match wagon on each end), an interesting move! The train was stopped in both Newcastle Central and Edinburgh Waverley stations at what was the expected 'in service' stopping point to identify where marker boards should be placed at either end of the train.