London Mayor Boris Johnson is desperate to be prime minister but would rather see David Cameron "fail miserably" at the next election than betray him, former government spin doctor Andy Coulson has said.
Mr Coulson, former No10 director of communications, advised Downing Street to support the mayor's good ideas, "advise privately on the bad ones, but only engage publicly if absolutely necessary - and celebrate Boris's considerable successes".
More top news
The Duchess of Cambridge today made her last public appearance before the birth of her second child, with the Duke saying "any day now".
The tomb that houses Richard III's coffin has been revealed in Leicester Cathedral.
Launching Plaid Cymru's campaign, leader Leanne Wood, says the general election offers Wales an "unprecedented opportunity" for change.