Thousands of people have gathered in Parliament Square for a rally against US President Donald Trump's second state visit.

Organisers Stop Trump Coalition - a group of more than 50 unions and charities - marched from central London's Portland Place towards Whitehall at around 15:00 BST.

Some protesters carried signs with slogans written across them, including "no to racism", "no to Trump" and "stop arming Israel".

Others carried smaller versions of the 20-foot Trump Baby blimp that floated through crowds during protests against the president's first state visit in 2019.

The Metropolitan Police estimated that up to 5,000 people were in attendance.

More than 1,600 police officers had been deployed, including 500 from other forces, the force said.

Earlier on Wednesday, the Met Police's Deputy Assistant Commissioner, Louise Puddefoot, said it would be "another busy day" for officers. This protest came just days after the Unite the Kingdom protest.

She added that police had been in "close contact" with the organisers and had asked all taking part to be "considerate to the local community" and keep disruption to a minimum.

The Stop Trump Coalition includes groups ranging from climate campaigners to anti-racism groups and pro-Palestine organisations.

Ahead of the march, a spokesperson for the coalition said: "A government that will bow down to Trump and to racism is one that will open the door to fascism."

Although Trump was not visiting Parliament, the protest groups said they would demonstrate to "defeat the politics of Trumpism" and to promote "an alternative, democratic vision of the world based on peace, social justice and international cooperation".

In the midst of the crowds - which started gathering near BBC Broadcasting House - people told the BBC why they were there, racking up a long list of grievances against the US president. They said they found him "despicable" and wanted to send a message that he was not welcome.

Reverend Poppy Hughes, who was asked about those who said vicars should be apolitical, replied: "Jesus preached peace and compassion and that's why I'm here".

Zoe Gardner, a political commentator and one of the organisers of Wednesday's protest, said that Trump "represents everything that we hate".

"We want our government to show some backbone, and have a little bit of pride and represent that huge feeling of disgust at Donald Trump's politics in the UK," she added.

Climate campaigner Auriel Dowty Glanville from Wimbledon said she was demonstrating because she believed the president was a "climate denier" and climate change was "the biggest threat facing us on Earth".

She called the second state visit invite "appalling", adding: "It's all about the trade deal."

Sarah Montgomery and Claudio Solano, from North London, arrived in white protective face masks that read "Trump stinks".

They said they had had the masks since Trump's first state visit.

"He still stinks," Ms Montgomerysaid. "Everything he stands for stinks."

Mr Solano, from Brazil, said he disagreed with both Trump's policies and his support for Brazil's former right-wing leader Jair Bolsonaro.

"It is disgusting, and I don't understand why Britain has to be so cowardly," he added.

As the crowd moved, it paused outside Downing Street, which was being protected by officers from Wales and Northern Ireland.

Some of the demonstrators carried signs including "Duck Off Donald" and "Feed him to the Corgis".

At Parliament Square - where the march stopped - a number of people took to a stage. There was a performance from singer Billy Bragg.

Other speakers included former Labour MPs Jeremy Corbyn and Zarah Sultana, comedian Nish Kumar, and Green Party leader Zack Polanski.

A small crowd of protesters also gathered in Windsor on Wednesday afternoon, where Trump is spending the day with the Royal Family ahead of the state banquet.

Amy Tisi told the BBC she protested the last time Trump visited and it was "important to make a stand". She said she questioned if the "size and scale" of the trip was meant to fuel his ego.

But one Trump supporter, wearing a Davy Crockett hat, called him "the greatest president". His remark was met with a chorus of boos from parts of the crowd.

Earlier on Wednesday, a van decorated with a photograph of the president and late convicted paedophile financier Jeffrey Epstein was driven through Berkshire.

A Thames Valley Police spokesperson said the driver had left after a conversation with the police, adding: "No arrests were made and no vehicles were seized."

Referring to this incident during his speech in London, Corbyn called it "sinister" that the van was stopped by police, preventing people from "expressing a point of view".

"They take away the right to protest because they don't want us to protest," he added.

Four men were arrested after images of Trump and Epstein were projected on to Windsor Castle on Tuesday as the president arrived in the UK.