MayBee70
I’ve just read that Burnham used a government jet to fly to Manchester yesterday…( happy to be corrected on this) 
Yes Burham did use the government airbus on Thursday afternoon and then Friday morning. It wasn't possible for Burnham to meet his packed diary commitments on Thursday and Friday unless he used the government airbus.
AB flew on the government VIP airbus which departed from a private section of Stansted airport so secure, no queues, no check in delays and no airport security to get through. The airbus also has a highly secure wifi connection so government minsters can continue to work securely on line and make secure phone calls.
Cameron, May, Johnson, Truss, Sunak, Starmer all used the VIP airbus, though Sunak was criticised for more often using private jets. The Ministerial Code has clear long standing rules for the appropriate use of the VIP airbus for government domestic and international travel to permit use for operational, security and schooling priorities and commitments.
The flight from Stansted to Glasgow took 55 minutes on Thursday, then Glasgow to Manchester early Friday am took 38 minutes (so around 1.5 hours total during which AB could work securely). In comparison the 2 separate train journeys, 4.5 or 5.5 hours London the Glasgow and around 3 hours 20 mins G to Manchester respectively, with actual delays a whole working day essentially that AB would not be able to meet others. Trains of course are often subject to unforeseen departure delays, possible cancellations, wifi connection not secure etc.
AB started off his day on Thursday working in London- then went on to the Hare pub in Harlow Essex to make a policy announcement. From there he went to a private section of Stansted airport to board government VIP Airbus for a 55 minute journey to Glasgow on which he could securely work.
On arrival in Glasgow AB then met with the Welsh First Minster (who also no doubt has a packed diary) and others. AB then went on to the Commonwealth Games where he sat beside King Charles and Camilla for the Opening ceremony that began at 20.00 that carried on late into the evening. So a long day.
AB then had an early start Friday morning and a 38 minute flight to Manchester to open No 10 North. All of these commitments reported in the press and he would have had to leave London early am for a 5.5 hour or 4.5 hour train to get to Glasgow in time to meet the Welsh First Minster- so all other Thursday. commitments would have to have been cancelled.
Just looked on line- the last train from Glasgow to Manchester leaves at 20.06 so he wouldn't have been able to be at the opening ceremony of the Commonwealth Games with King Charles that began at 20.00
The Commonwealth Games won’t be opening every Thursday so I doubt AB will take a flight every week from London to Glasgow and then Glasgow to Manchester every Thursday. Time will tell and AB's use of the government airbus compares to his predecessors.
The press and others parities will complain about PM jet travel- twas always thus. As long as AB uses the government airbus in line with the Ministerial code he is no worse than all recent PMs.