Monarch A300s are around 22yrs old, their 757s 24 years old-even the A320s are knocking on 18yrs.
The Baby 733s are 13-20 years old, so the Jet 2 733s at 19-25yrs old certainly aren't out of step. The 75s are only 14-24 yrs old - half the age of Delta DC9s- who as far as I know have not ordered anything new.
Yes they all need more TLC as they get older, but the Jet2 schedules are hardly pushing the boundaries- so I am surprised at their poor OTP. Are all the delays down to tech aircraft, or is there more to it than that?