Airports should be banned from serving alcohol to passengers before early morning flights, the Ryanair boss, Michael O’Leary, has said. He said the measure would reduce the number of passengers who were disruptive onboard aircraft. O’Leary said Ryanair was being forced to divert an average of nearly one flight a day because of bad behaviour onboard, up from one a week a decade ago. In an interview with the Times , O’Leary said: “It’s becoming a real challenge for all airlines. I fail to understand why anybody in airport bars is serving people at five or six o’clock in the morning. Who needs to be drinking beer at that time?” Airside bars in the UK are not required to follow restrictions on opening hours that apply to other venues selling alcohol. O’Leary said: “There should be no alcohol served at airports outside [those] licensing hours.” He said Ryanair rarely served more than two drinks to a passenger, and called for a two-drink limit to be introduced at airports.…