Police have detained the British Prime Minister's former spokesman on suspicion of perjury.<br /><br />Andy Coulson resigned from his post at Downing Street last year in the wake of the UK phone hacking scandal. <br /><br />Before joining David Cameron's team he'd been an editor at the tabloid at the centre of that scandal, the News of the World. <br /><br />Al Jazeera's Harry Smith reports.
