Nearly 250,000 activists descended on the streets of central London to protest Donald Trump's visit to the UK, organisers said.

Protesters marched through the capital carrying placards reading "Dump Trump" and "Star Spangled Gobs". 

Aerial images showed the streets of central London from Portland Place to Trafalgar Square packed with tens of thousands of people taking part. 

Stop Trump, the group which organised the biggest march, said that there were 250,000 people taking part.

The day began with the unveiling of the Trump baby blimp in Parliament Square, which was crowdfunded by campaigners furious that Mr Trump was being welcomed to the UK.

The balloon, which depicts Mr Trump wearing a nappy and carrying a mobile phone, was later pictured among the marching crowds. 

Later, Labour leader Jeremy Corbyn addressed crowds at a rally in Trafalgar Square and was received with enthusiasm.

"We are asserting our right to demonstrate, our right to free speech," he said.

Mr Corbyn said Sadiq Khan deserves support and not condemnation. "Human rights belong to all of us," he added.

Mr Corbyn said the message of the demonstration was "one of solidarity". He added: "When we unite together with common objectives, we can all win."

The crowd applauded him warmly and chanted "Oh, Jeremy Corbyn".