They got 34 brand new 737-800NG's back in 2015 at no doubt a decent price, since they were approaching the end of their production cycle, while the order book for most others consisted of the 737MAX. While ordering new aircraft now may seem ambitious, many are cancelling/deferring orders that were part of their expansion strategy and putting downward pressure on pricing. Jet2 however are in need of a fleet renewal, and that's crucial longer-term if they are to emerge from the pandemic as a successful, competetive carrier. I wouldn't be so quick to rule out a potential order from them- Airbus or Boeing.