cherrylock.
the fact is that at sometime or another every airline and every aircraft new or old will suffer delays for any amount of reasons,its a case of you pays your money you take your chances.
id be interested to know why from your first post ten days ago of "never again" with jet2 are you so "keen to give them another go" whilest most of your posts inbetween seem to question the reliability age and condition of the jet2 aircraft?