If anything Jet2 are being quite optimistic at this time, considering the present line the UK government is taking.
I can quite understand this view being publicly aired as they are encumbered to sone extent to their shareholders. I took a look at the RyanAir latest financial forecasts, and wondered how on earth Jet2 are getting along with cash if those guys are having such a bad time and forecasting a 2022 year at best a break even, looks like a real horror comic for airlines.