Spanish eyes
Who said anything about holidays? Some people need to travel for other reasons. The WZZ flights were up there briefly but now seem to have disappeared until 18/5.
As ericlday says, I also know people flying the Lanzarote & Grand Canarias sectors inbound who have British passports and are returning to get the jab. Couldn't tell you how that works as don't you have to be invited by your UK GP?