Search for new No 10 media chief after Coulson resigns

David Cameron is beginning the process of appointing a new head of communications at Downing Street after the resignation on Friday of Andy Coulson.

Mr Coulson stepped down because he said the allegations about phone-hacking at the News of the World when he was its editor had become a distraction.

He has always denied any knowledge about hacking.

The BBC's political correspondent Naomi Grimley reports.