In the UK, British Airways, Ryanair and Easyjet are among airlines warning British holidaymakers of delays at EU border controls at many European airports.
British Airways sent texts asking travellers to make sure they arrive early, as the company expects longer queues due to "enhanced immigration checks" across Europe. BA has already sent texts to customers flying back from Lyon, Madrid, Barcelona and Milan. They will follow this advice to all UK bound passengers from most European airports in the next few hours.