Tom Watson tells Cameron he warned him about Andy Coulson

Tom Watson MP has told David Cameron that he wrote him a letter in October 2010 warning him about his employment of Andy Coulson, the former editor of the News of the World, as his media adviser.

The Labour MP for West Bromwich East made the point during a question in the emergency debate in the Commons on the phone-hacking controversy.

The Commons is sitting for an extra day after the prime minister delayed MPs' summer recess so the fallout of the crisis could be discussed.