The School of Journalism at London’s City University didn’t waste any time. No sooner had Roy Greenslade confessed to being a member of Sinn Fein and a supporter of the IRA’s “armed struggle” than he was stabbed in the front quicker than you could say “knife”. Quite right, too. Greenslade – a former editor of the Daily Mirror, senior executive at the Sun and Sunday Times, columnist for the Evening Standard and long-time media commentator at the Guardian – had been a professor of journalism at the school for 15 years, with a particular interest in journalistic ethics.