By Guy Taylor Wetherspoon boss Sir Tim Martin has clashed with Ryanair’s chief executive Michael O’Leary after the latter called for a two-drink limit at airports. O’Leary said on Tuesday there had been a rise in in-flight violence over the summer due to increasing drug and alcohol use, with fights now breaking out on a weekly basis. “You have a higher rate of people on f***ng powder and alcohol, it’s the mix of f***ng drugs and alcohol,” he told reporters at a press conference in London, suggesting introducing alcohol limits at airports would help curb disorder. But Martin, the head of the po…