Donald Trump has reignited his row with London mayor Sir Sadiq Khan after calling him a “nasty person” who has done “a terrible job”.

During an hour-long news conference with Sir Keir Starmer in Scotland, the US president hit out at the Labour mayor, who has responded with his own snipey remarks.

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Asked if he would visit London during his state visit in September, Mr Trump said: “I will, I’m not a fan of your mayor, I think he’s done a terrible job.

“A nasty person, I think.”

The prime minister then interrupted and said: “He’s a friend of mine.”

But the president added: “I think he’s done a terrible job but I will certainly visit London, I hope so.”

Sir Sadiq’s spokesperson then released a statement saying: “Sadiq is delighted that President Trump wants to come to the greatest city in the world.

“He’d see how our diversity makes us stronger not weaker; richer, not poorer.

“Perhaps these are the reasons why a record number of Americans have applied for British citizenship under his presidency.”

They noted that Sir Sadiq has won three mayoral elections, including when Mr Trump lost the US election in 2020.

This is not the first time Mr Trump and Sir Sadiq have locked horns.

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During his first presidential term, Mr Trump called the London mayor a “stone cold loser who should focus on crime in London”.

Sir Sadiq then described Mr Trump as a “poster boy for racists”.

And in November 2024, after Mr Trump won his second term, Sir Sadiq said many Londoners would be “fearful” about what it would “mean for democracy”.

However, as Sir Keir tried to show diplomacy with Mr Trump after becoming PM, Sir Sadiq said he “wanted to work closely with the American president” ahead of his inauguration in January.

The London mayor said as somebody “who believes in democracy, and voting and elections, we should recognise the fact that Donald Trump is the elected president of the United States”.

But he added: “Let’s keep our fingers crossed that this president is different from the last time he was president.”