Protesters clash with police in central London
Aerial footage shows protesters gathering in central London, despite police warnings to avoid demonstrations.
Various groups from around the country, including right-wing activists, said they had come to London to protect symbols of British history.
A Black Lives Matter demonstration planned for Saturday was brought forward by a day over fears there could be clashes with far-right groups.
Organisers urged people not to join any anti-racism rallies planned for the weekend.