That is the paradox of Mr O’Leary’s Ryanair. It is hugely successful. It has brought flying within the reach of people of the most limited means. It has helped to change the economic prospects of neglected parts of Europe by bringing passengers and their money to underused provincial airports. But at the same time Ryanair has become a byword for appalling customer service, misleading advertising claims and jeering rudeness towards anyone or anything that gets in its way.