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
Headteachers could strike in protest at government plans to force schools to become academies
Tonight it'll become dry and clear for most parts of Britain.
A rugby jersey dating back to 1894 is going under the hammer - and is expected to fetch up to £20,000 at auction.