Flap15
"However it is not the length of the sectors or the number of time zones you cross that causes jet lag/fatigue on the easy 5/3/5/4 roster pattern. It is the time shift that occurs with getting up for five days on the trot at 3.30-5.00. This pushes you 3-4 time zones east by the end of your block"
Possibly I have a misunderstanding of jet lag too, thought that it was from being out of sync with destination and arrival time-zones?
Don't you generally in the lo-co world, be it Easy or Ryanair, start and finish in the same place?
Admittedly early starts can throw you out of your circadian rhythm but isn't jet lag in this case as far as I'm aware, or do milkmen suffer from float lag?