Conservative grandee and former leadership contender Lord Heseltine has launched a scathing attack on Boris Johnson, accusing him of creating the "greatest constitutional crisis in modern times".

Lord Heseltine, a former deputy prime minister, told the BBC the former London mayor had "ripped the (Conservative) party apart."

Lord Heseltine described Mr Johnson as "like a general, that led his army to the sound of guns, and at the sight of the battlefield abandoned the field."