The ‘Unite For Freedom’ rally began at midday – with protesters calling for an end to “government lies” over the pandemic.
Pictures show large crowds gathered in Trafalgar Square holding signs claiming that the virus is a “hoax” and a “scam”.
Other placards read: “No to mandatory vaccines!”
Most of the defiant crowd refused to wear a mask during the protests.
The event is currently moving towards Downing Street and towards the Houses of Parliament.
Well-known conspiracy theorist David Icke – well known for his conspiracy theory linking the coronavirus to 5G technology- is currently addressing a large crowd.
In May, Icke had his YouTube account axed in May after repeated warnings from the company that he had violated its policies by posting misleading information about the pandemic
His address follows an earlier speech from Jeremy Corbyn’s brother Piers.