Trump supporters demand arrest of London Mayor Sadiq Khan It comes after Sadiq Khan said Donald Trump had realised he is "not welcome" in London after cancelling a planned visit.

Image: The demonstrators shouted pro-Trump and pro-Brexit slogans

Supporters of US President Donald Trump have disrupted a speech by Sadiq Khan, calling for the London Mayor to be arrested.

Mr Khan was about to start speaking to the Fabian Society in London when he was disrupted by protesters from a group called the White Pendragons, who shouted pro-Trump and pro-Brexit slogans.

It came after a tweet by Mr Khan on Friday, in which he said Mr Trump had "got the message" that he was "not welcome" in London after the President cancelled a planned visit to open the new US embassy.

In a video posted on social media, one protester could be heard saying: "Ladies and gentlemen, we're here today to make a non-violent, peaceful citizen's arrest."

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Image: The protest delayed the speech for about 15 minutes

As security began to appear, those in the audience started to heckle and slow-handclap.

But a demonstrator, unperturbed by the reception, said: "We stand under common law jurisdiction.

"If you touch us, you'll be done for common assault. Please stand back, do not touch us.

"We're not leaving, we've paid for a ticket."

The demonstrator also accused the Fabian Society of "subverting" the constitution.

Mr Khan sat down and flicked through a newspaper while police escorted the demonstrators away.

Image: Sadiq Khan flicked through a newspaper when his speech was disrupted

Sky News political correspondent Laura Bundock said the protesters had been sitting "right at the front of the room", and delayed the start of Mr Khan's speech for 15 minutes.

The group told her that MPs had "broken their oaths of office", adding that they were "employed by us, the people" and "should do as we say".

After paying £35 to get in, they said they were "heading to the pub afterwards".

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Mr Khan has called Donald Trump's policies "divisive", describing them as the "polar opposite" of London's values of "inclusion, diversity and tolerance".

When Mr Khan resumed his speech he made light of the disruption with a reference to Theresa May's Tory conference speech last year, saying: "On the plus side, I wasn't served with a P45."

Mr Khan added: "It is a pleasure to be here even though we were distracted by the actions of what some would call very stable geniuses."

Mr Trump recently used the words 'stable' and 'genius' to describe himself.