Based on the state of play currently, a prediction for Friday night's Euston - Glasgow/Edinburgh service
92033 to Carstairs with 92014 to Edinburgh, because my luck with getting required 92s is terrible!
92014 has apparently dropped on to the Highlander tonight with 92028 taking over Carstairs portion, however, 92028 is due a B Exam in a couple of days, so will likely head South tomorrow night, meaning one of 90042 or 92033 heading North tonight
may take over Carstairs... if it's 90042, it needs to go back South towards the end of the week (possibly) for exam.
Add into the mix 92010 could appear from Craigentinny (possibly) before the week's out and/or 90047 currently "spare" at Willesden may get in on the act at some point when 92028 is stopped for its exam (especially if 92010 isn't ready by then...)
And still time for half the fleet to get wh**lf**ts again...
So I think predictions for Friday night are a tad challenging!