Or not. I forgot about the variety of DMUs serving both. And the Watford DCs. Liverpool St may have been valid though, I'm not sure whether the379s are dual voltage, they can easily be made so if they aren't.Kings X and Euston were also possible.
Now that's a vicious little clue. I can't give a very confident answer, I'll be guessing at Newton Lanarkshire
I knew that it had a consistant number for terminating services and stopping services, but I don't know what passes through without stopping
Larkhall services are non-stop between Rutherglen and Blantyre.
Fairfield as a guess for the current clue