Low cost airlines have revolutionised the European aviation business over the past 25 years - offering cheap flights, no frills and a service sometimes to be endured rather than enjoyed. How much further can the budget airlines grow? Hardtalk speaks to Carolyn McCall, the CEO of easyJet, which carries more international passengers than Lufthansa, British Airways or Emirates. Is flying always going to be this affordable and accessible?(Photo: Chief Executive Officer of easyJet Carolyn McCall. Credit: Reuters)