From what GTR have said the summer changes are unconnected to drivers, but if you’re really interested here’s a quote from the recent
Government press release on their nationalisation
Well, GTR didn't manage to solve their driver shortage problems for the whole 140 months they had the franchise, despite huge promises early on of the 'biggest driver training program in history' or something along those lines. So after 12 years of endless 'no driver' cancellations, particularly on Saturdays, I'll believe it when I see it.
And it's not exactly reassuring that these weekday cuts are the first thing happening post-nationalisation, it continues the pattern we saw last year from GTR of extending the traditional Christmas period of altered services to include the week *before* Christmas. At this rate they'll be running an altered timetable more weeks than not.
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What's stopping strengthening the Cruisers on weekends and holidays from 2x4/8-car to 3x4/12-car?
Even on weekdays, what is now the 1010 service from CBG was going to be 12 car from May 2020 (4 cars from KLN and 8 from Ely, joining at CBG) but that never happened due to other things that happened in 2020 and it hasn't reappeared.
Interestingly, in the current weekday timetable most 'cruiser' services have more than sufficient dwell time at Cambridge in the up direction to do at attachment, but most don't have enough time in the down direction to do a detachment.
Meanwhile the Thameslinks and GA semifasts regularly depart with less than half seats occupied despite only taking 20 minutes longer.
Both fill up as they move down the line though, so it would be a bit rubbish for people getting on at say Baldock or Audley End if these were always full and standing from Cambridge.
Certainly I had a period when I was regularly going to London at weekends, maybe 10-15 years back, of picking these up rather than the 'cruisers', especially on Sundays, when 1 8-carriage 'cruiser' every hour was totally inadequate and always very full and standing leaving CBG. There were some murmurs then about adding a second 'cruiser' on Sundays but that never came to pass.