Boris Johnson and Ed Miliband in furious TV clash
The Mayor of London and the Labour party leader went head-to-head on the sofa of the Andrew Marr show as the British elections neared.
Boris Johnson told Ed Miliband that he would do "more damage to this country than he did to his brother" in a bitter confrontation.
The pair appeared on the sofa together during the Andrew Marr show on BBC One.
Their appearance descended into acrimony, however, after Mr Johnson attacked Mr Miliband's pledge to abolish non-dom tax status. He said that even Ed Balls, the shadow chancellor, believed it would "produce less money".
Mr Miliband accused the Mayor of London of supporting "state sponsored tax avoidance", before repeatedly speaking over Mr Johnson and telling him: "Don't get rattled Boris, come on."
The Mayor of London said that both he and Mr Miliband attended the same primary school and university, "a fact you won't hear Ed Miliband admitting very often".
Mr Miliband said they did not go to the same secondary school, a reference to the fact that Mr Johnson attended at Eton.
Mr Johnson was then asked about his comments in The Sun on Sunday that Mr Miliband had "clearly stabbed his brother in the back", a reference to his defeat of his brother David in Labour leadership election.
He said: "I'm not saying your brother would present himself at A&E with a dagger in his back, but he would do more damage to this country than he did to his brother."
Mr Miliband suggested the attack was inspired by Lynton Crosby, the party's campaign leader. He said: "Lynton Crosby is putting him up to it. Come on, you're better than that. If you're going to become leader of the Tory party you should get rid of him."
Mr Marr said during the interview that "this is a premonition of things to come".
Mr Johnson continued with the debate as Mr Marr tried to close the programme: "Shut up now, please, sorry," interjected Mr Marr.
Mr Johnson earlier dismissed claims that he wants to be leader of the Conservative Party as "nonsense".