I'm all for the railway industry getting favourable publicity out of good news stories. But this one does rather stick in the gullet as there is no good news for the travelling public.
Over the last year Avanti have added extra time and extra stops into this service, swinging the time balance over to air - especially the London City route as the short check in means that truly is end to end faster than rail.
Add to that, over the last few weeks trying to buy tickets for Avanti services has been stupidity difficult, with reservations sometimes only opening up two weeks ahead. (Before anyone mutters Covid, LNER have managed to stick to the usual ticket release cycle, and they had the Kings Cross rebuild). I've driven a few times lately when I'd previously have used the train and my neighbour gave up her planned trip as she found trying to buy a ticket from Avanti impossible.
Avanti might want to go for the positive publicity stuff after they've sorted out the basics....
You are forgetting this run has been organised to raise funds for charity - Action for Children and Railway Benefit Fund -which is a positive thing.
As explained above - Covid travelling restrictions and reduction in passengers using trains has forced TOC's to reduce the number of trains running - guided by the DfT who are paying for it.
Therefore the scheduled Glasgow service has picked up additional stops and pathing time - but is still significantly quicker than driving. And arguably not much slower than air taking into account airport transfers and waiting times.
If COVID restrictions ease in due course the standard timetable should be back to normal in September.
COVID is to blame for the reduction in services - not the TOC's or railway industry.
This charity run was apparently planned in 2020 before COVID had a say in matters - so the fact it is back on the agenda is also positive.
Whether or not a record is achieved isn't the main point. But those volunteering on the day will hope that their efforts will result in a record and a few quid raised for charity.