Exclusive: Michael O’Leary predicts ‘another mess’ for peak-season travellers Sign up to Simon Calder’s free travel email for expert advice and money-saving discounts Get Simon Calder’s Travel email Get Simon Calder’s Travel email Email * SIGN UP I would like to be emailed about offers, events and updates from The Independent. Read our Privacy notice The boss of Europe’s biggest budget airline has warned of long delays this summer caused by air traffic control problems – and predicts that some