Sadiq Khan has branded Donald Trump "racist, sexist, misogynistic" and "Islamophobic" following the US president's latest attack on London.
The London mayor said he was "living rent free" in Mr Trump's head after the US president used his address to the UN General Assembly on Tuesday to criticise the UK, and London specifically.
The president continued his long-running criticism of Mr Khan and told delegates the UK capital was being run by a "terrible mayor" who had "changed" the city.
One of his most outlandish claims was that Sharia law, Islam's legal system, was operating in London - which there is no evidence for.
The president said: "I look at London, where you have a terrible mayor, terrible, terrible mayor, and it's been changed, it's been so changed.
"Now they want to go to