Essentially it comes down to how the paths fall - this isn't a blank-sheet recast as the TPE and XC services still have to run to their existing paths (more or less) once off the ECML - and how the electrical supply constraints work into that.Pardon my ignorance but why is there no capacity for TPE extensions to Edinburgh every hour? From what I saw it looks as though there is a net reduction in services north of Newcastle compared to now, there isn't anything new added, is the current timetable just too unreliable, or is there another reason?
For several reasons, that is unlikely to happen.I think Scotrail should extend the 1tp2h Edinburgh Dunbar to Reston and leave TPE and XC out of it.
On the positive side, this is the 'worst' it's likely to get, and it is still an increase compared to today's timetable, even if it is less than December 2019.