can't see jet2 been in any trouble as they are planning things for later on in the year, getting rid of proffitless routes make room and scope for the aircraft they have. Don't forget unlike most airlines not just Low cost they own everything outright no bank loans no leases on anything so it will not cost them money to have aircraft on the ground in the down turn that seems to be happening. Plus they have one more 757 coming into service shortly.
ETOPS is the next big thing and this cost so much to get up and runnung, even more so with a mixed fleet of 757's they must have bigger idears for the low cost / charter market.
So personaly think jet2 will be one of the last to vanish from the market. bigger is not always better. bigger means you have more to loose.