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
Is the pledge to give Scotland more powers a last throw of the dice, or the reassurance some voters need to seal a No vote?
A mother from north Wales says she was stunned to find a talking Barbie doll using foul language.
The Plaza de Margaret Thatcher in the centre of Spain's capital has received a mixed response from politicians in the country.