Watching a parade of Austrian registered easyJet flights arriving and departing Gatwick recently, I was wondering what was the point of this wholesale shift from the UK register to the Austrian. My guess was as a backstop arrangement to protect easyJet from post-Brexit rule changes restricting, or even stopping, flights by UK carriers into Europe. If that guess is correct, have easyJet wondered what would happen if the UK government said something along the lines of "You ban our flights into Europe and we will ban yours on a reciprocal basis"? If the easyJet move is indeed for protection against post-Brexit disruption, could it all go wrong?