A turbulent time for low cost airlines?

In recent months, a number of low-cost carriers have been feeling the pinch, cancelling flights, even losing their senior staff.Is it simply a case of the low-cost airline business having over-reached itself in the recent decades of relentless airline expansion? We hear from the Independent's Travel Editor Simon Calder on the rise of Ryanair. Tim Jean, a senior executive on the airline from 1995 to 2004, gives us a sense of the inner workings of the Irish carrier and its colourful boss, Michael O'Leary. And we look to the potential growth in places like Africa and Latin America.