London Mayor Boris Johnson "desperately wants to be prime minister", according to Downing Street's former spin doctor Andy Coulson.
Mr Coulson went on: "If proof were needed that our PM is a man untroubled by self doubt, it came in his next sentence - 'so I think he'll be a bloody brilliant candidate for us'.
"Stabbing David, or anyone else for that matter, in the back would be distinctly off brand - just not very Boris. He would much prefer to see David fail miserably in the election and ride in on his bike to save party and country."
More top news
An ITV Tonight investigation found more than half of women surveyed between the ages of 18 and 34 have been sexually harassed in public.
Katy Perry performed her new single surrounded by two giant skeletons seemingly modeled on Donald Trump and Theresa May.
The Brits saw two awards handed to the late David Bowie and tributes to George Michael. Here is a full list of the winners.