A giant balloon depicting Donald Trump as an angry, orange baby will fly near the British Parliament during the US president's controversial visit to the UK next week.
Permission for the 6m high inflatable, dubbed "Trump Baby", to rise above Parliament Square Gardens for two hours on the morning of Friday 13 July has been granted to protesters by the Greater London Authority.
Mr Trump is expected to arrive in the capital the evening before the planned stunt and is likely to visit Blenheim Palace, meet Queen Elizabeth at Windsor, hold talks with Prime Minister Theresa May at Chequers, and travel to his golf courses in Scotland during the trip.
Activist Leo Murray said: "We didn't get off to the best start with the Mayor's office over this, who originally told us that they didn't recognise Trump Baby as legitimate protest.
"But, following a huge groundswell of public support for our plan, it looks like City Hall has rediscovered its sense of humour. Trump Baby will fly."
A spokesman for the Nona Hurkmans group, which is behind the protest, said: "We are just a small group of friends who set out to use humour to take a stand against the rise of racist and fascist politics both here in the UK and over in the US.
"We have been genuinely overwhelmed and touched by the incredible levels of support we have received for our project."
More than 10,000 people signed a petition calling for the inflatable to be given permission to fly, activists said.
"The mayor supports the right to peaceful protest and understands that this can take many different forms," a spokesman for Mayor of London Sadiq Khan said.
"His city operations team have met with the organisers and have given them permission to use Parliament Square Garden as a grounding point for the blimp."
The spokesman added, however, that the protesters would also need permission from the police and air traffic services to fly the balloon.