Chesty Morgan, you might need a bit of time reading up on on your Jet2 company manuals (cabin safety manual). If you do you will find defibrillators are only fitted on the Boeing 757 when they are doing ETOPS flights. Since there are only a few ETOPS flights in the winter it's safe to say 99.9% of jet2 their flights don't have a defibrillator onboard.