Whilst on the subject of ETOPS, what are Jet2 going to do to keep on seasonal USA flights, after the departure of the 752?
It's an almost insignificant % of their overall operation, essentially shopping trips operated seasonally. Commercially it should be possible to fill any gap in the program with something else, it's not as if the company has a need to operated "prestige" routes, even though it's no longer seen as prestigious market tbh.
As to operating B777s, well European tried operating ex BA B747-236Bs and that didn't work out especially well alas. Too much aeroplane to fill with substantial engineering and training costs associated with a fleet that wouldn't be flown all that often I suspect.
Flew one last month mind, was quite surreal on the flight out of AMS watching the map as we flew past Ukraine.