I agree completely. My comment was more about the HSTs working such a service rather than the rationale for it in the first place. Changed times from their original purpose as built.
Well, I appreciate the southbound from Perth to Glasgow isn't the best working, but at least it goes on to Aberdeens and not Dundees.
It's a difficult one to reconcile getting off depot to wherever needed for working services.
There are a number of excessive ECS workings as part of the HST diagrams, with sets arriving variously at Glasgow Queen Street, Edinburgh, Inverness and Aberdeen - shunting to depot, then returning later. In some cases its 3 hours or more before they return, not very efficient.
At least 1T06 is a less wasteful operation.
Trouble is, without any timetable recasts, I don't see the diagrams changing much.
They are pretty much unchanged since Fit for the Future came in and at least that did put HSTs on some busier services.
For instance, the 0707 Glasgow to Inverness was HST pre-May 22, while what is usually the busiest working, the 1007 was booked 170. That is now the other way round, and the 1007 is probably a fair candidate for a five-car in the summer.
There was talk of a slight recast of the HML at least in December 2024, but that was last discussed very early last year and I don't know if that is still to be the case.