Pre-announcement of punctual flights
My last two easyJet flights have been punctual, and I received a message in each case 24 hours before departure saying they would be punctual.
When I worked at Heathrow years ago, we were just introducing a system called something like A-CDM which was mandated by the EU and was (IIRC) meant to consider every possible factor that might delay an aircraft and make a Europe-wide plan for every plane - and probably every airport worker and every ground vehicle - comfortably in advance. Is that what enables easyJet to know there will be no forseeable delays?
It's incredibly impressive.