The row continued off-air when a furious Mr Johnson swore at his Labour opponent.
Travelling up to the roof terrace to be photographed, the Mayor shouted at Mr Livingstone "it's all f****** lies, it's all f****** lies".
More top news
Lord Sugar has told Katie Hopkins to "shut up" after the ex-Apprentice contestant criticised celebrities who paid tribute to Cilla Black.
Jeremy Corbyn's economic policies would harm the poor and leave the Tories in power for a decade, Chris Leslie has warned.
Landlords have been warned they could face up to five years in prison if they fail to remove illegal immigrants from properties.