A striking photograph taken by Reuters photographer Dylan Martinez during Saturday’s protest in London showed a Black Lives Matter demonstrator rescue an injured counter protester.
In the photograph several anti-racism protesters are seen assisting the injured white protester.
The photograph has since gone viral and has been shared widely on social media.
Scuffles broke out between far-right activists, Black Lives Matter protesters and police trying to keep the two sides apart.
There have been demonstrations around the world against racism and police abuses since the death of African American George Floyd in Minneapolis last month.
In British cities tens of thousands of people have marched peacefully during previous days of protest.