Obviously, services going beyond Edinburgh to places like Inverness or Aberdeen will be HST diesel units.
Also, the 125 Society publishes a list of diesel services here:-
http://www.125group.org.uk/wp-content/uploads/2017/06/HST-Diags-VTEC.pdf
Bear in mind though that these are liable to last-minute changes during times of disruption.
Thanks that is just what I need, although my next visit will be in the winter, at least the summer schedule will be a guide, I don't suppose you know when the winter schedule is published do you?
Proof that they do change the schedule is demonstrated by the fact that I was on an electric train from Newcastle leaving at 10 am this Summer (which is the 8.30 am from Edinburgh) which according to that schedule should have been a diesel train.
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