Nice shot, though I believe an addition to the RMWeb livery notation is required: I propose GSqYP.
I would be tempted to choose one of those for my 40 when time comes, sadly the conversions were too late for my chosen period so I'll have to be boring and do a conventional machine.
Nice shots on that site (new site to me, thx), there's an absolute belter of a Peak heading over Chirmorie.