Crikey, how Jet2 have not offered Vokes 55 a job to rescue them I don't know.
They're a pretty astute bunch at J2 and they would have done their calculations. Making good use of furlough. Not outsourcing so many ground handling services has worked for them & they all can be paid under furlough. The stop start situation others have been in is expensive.
We don't even know where the "green corridors" will be yet- but we do know they will come with hefty PCR tests for all destinations to get back to the UK.
Many of the elderly J2 fleet are owned & not under expensive leases like easyJet, their capitol value is low & they can be stored at low cost.
J2 have been very busy with numerous 737s doing crew training rather than sims- thus keeping the aircraft in active status.
They know what works for them & they will never be the same as TUI or easyJet- completely different set up.
Less leases, no outsourcing.
Try not to worry about J2 Voke55 I'm sure they'll manage without your incisive business acumen.
Relax & book your easyJet flight if that's what you want.