Does there have to be a stated policy for UK operators for who gets bumped in the event of overbooking/insufficient seats ? Does this have to be in their AOC ? I am aware that USA carriers have to have such a public policy, and indeed display it, for the order in which they drop off involuntary overbookings, to avoid any claim of discrimination. I can't see the CAA would sign off on "holiday bookings are prioritised over seat only bookings", and I doubt that is in the Conditions of Contract in those terms either.