Reality Check: “At the moment, the UK is part of an EU-wide agreement called the single aviation market. It means that any airline licensed by an EU country is allowed to operate any route within the EU, without needing advance permission to fly. If the UK leaves without a deal in March next year, airlines would lose this automatic right. The UK Government has said it would grant permission to EU airlines, but if the EU didn’t do the same, then there would be disruption to services. While uncertainty remains, airlines, like other businesses, are having to make plans. Ryanair, for example, is adding a 'Brexit clause' to all tickets sold for travel after 29 March; it’ll warn customers that the tickets may not be valid if there is disruption in the event of 'no deal' - and if flights don’t take place, the cost will be refunded."