In the end I headed to the gate with forty minutes to go. They were well into the process of loading the tensa maze but I made myself known to the desk and let through with the pre-boards.
It was a matter of minutes before boarding commenced and with ten minutes to departure we are boarding complete and ready to go.
G-NEOS today and I was last on board 1 year and 4 days ago on exactly this same route
Next Stop: Newcastle in, hopefully, less than an hours time