The bikini-clad Sadiq Khan blimp has taken flight over Parliament Square- while the campaigner who organised the event is forced to deny being anti-Semitic.
A small crowd of supporters gathered in central London to see the giant inflatable on Saturday morning with chants of 'higher higher' as it was raised into the sky.
Organisers raised more than £58,000 ($75,000) for the 29ft blimp as part of a campaign seeking to remove Mr Khan from his post.
The stunt comes after the London mayor defended the flying of a similar blimp depicting Donald Trump over the capital during the U.S. president's visit to the UK in July.
But organiser Yanny Bruere, 28, organiser of the 'Make London Safe' protest, has been accused of anti-Semitism after some old tweets have been uncovered.
The tweets were apparently on an old Twitter account of Bruere's with the handle @Yanny1112, according to Bellingcat
The account has now been deleted but screenshots of the content is being shared on social media and is being described as anti-Semitic.
In one exchange when responding to a tweet about Ken Livingstone he says: 'speak out against the Jews at your peril.
'You know who's in control when you're not allowed to speak about them.'
In another tweet he said that 'ISIS was created by Israel and USA.'
Speaking to TalkRadio he confirmed the account belonged to him but denied the comments were anti-Semitic.
The choice of yellow bikini comes from a decision by Mr Khan in 2016 that Transport for London would not allow adverts on its network which could create body confidence issues, following a storm over a protein shake poster which featured a model posing in a yellow bikini that asked 'Are you beach body ready?'
'I think a certain amount of respect should be afforded to the leader of the free world and the greatest ally the UK has - the president of America,' Mr Bruere said.
Small groups of protesters have gathered at the event, some holding welcome signs for Donald Trump in 2020.
Supporter Gavin Leonard, 59, from east London, said he thought the £10,000 cost of the blimp was 'money well spent'.
He added: 'I think it's very funny, it deliberately subverts the beach body ready adverts that Sadiq was so keen to ban.
'I always expected the crowd to be smaller than the Trump crowds this is a bit of fun.
'I think Sadiq Khan has been a terrible mayor for London. I think he's a liar because he said he would cut crime know we had no police to do it so I got in by telling lies.'
Mr Khan appeared unbothered by the protest told ITV London: 'If people want to spend their Saturday looking at me in a yellow bikini they're welcome to do so, I don't really think yellow's my colour, though.'
A Crowdfunder page set up by Mr Bruere, who describes himself as a free speech advocate, said: 'In light of the Donald Trump 'Baby Trump' balloon being allowed to fly over London during his visit to the UK, let's get a 'baby Khan' one and see if FREE SPEECH applies to all and whether or not Mr Khan and the London assembly will also approve this.
'Under Sadiq Khan, we have seen crime sky rocket to unprecedented levels. People in London don't feel safe and they aren't safe, 81 murders this year alone! Khan Out.
'Any surplus money raised will be used for a continuing campaign to remove Sadiq Khan from office and also for defending free speech which is constantly under attack.'
It is understood that the balloon will fly over Parliament Square today from 9.30am to 11.30am.
A spokeswoman for the mayor said: 'The City Hall 'city operations' team has spoken with the organisers of this balloon and given permission for them to use Parliament Square Garden.
'As always, City Hall has been working in very close co-ordination with the Metropolitan Police and other key agencies to ensure this protest is able to be carried out in a safe and secure way.'
This article has been adapted from its original source.
© Associated Newspapers Ltd.