Katie Price’s ex-husband Alex Reid was spotted at the Tommy Robinson rally in the capital.
The ex-cage fighter was on the rain-soaked streets on Saturday (13 Sept).
The 50-year-old posed for a selfie and mingled with other protesters.
He was one of up to 150,000 people who took part in the Unite the Kingdom event.
The 2010 Celebrity Big Brother star was in Hatfields, in Southwark, South London.
He said: “Well here we are, I’ve got my buddies to help me.
“Here we go.”
After panning to the crowd of protesters who are chanting and laughing, Reid turned his camera on one fellow protester and joked: “You look very far right you do.
“You’re a Nzi aren’t you. Nzis.”
“Right this is what it’s all about,” Reid said, as he videoed the chanting crowd.
They were stationed in South Bank next to a graffitied wall reading “Tommy Robinson”, as reported on Need To Know.
Protestors were trapped in the Union and St George’s flags on the streets of central London.
The demonstration was met by a 5,000 people taking part in a nearby counter-protest organised by Stand Up To Racism.
Elon Musk made a guest appearance at ‘Unite the Kingdom’ via video link where he called for the overthrow of the UK government.
He told protesters they must “fight back or die” over the “destruction of Britain” caused by “massive uncontrolled migration.”
The Metropolitan Police said 26 officers were injured and there were 24 arrests for assault, ABH, affray and criminal damage.
Met Police Assistant Commissioner Matt Twist said officers had suffered concussion, a prolapsed disc, broken teeth, a possible broken nose, and a head injury.
He said: “There is no doubt that many came to exercise their lawful right to protest, but there were many who came intent on violence.”
In a statement released by the Prime Minister Keir Starmer affirmed the public’s right to a peaceful protest, but condemned racial violence and assaults on police officers.
Mr Starmer said: “People have a right to peaceful protest.
“It is core to our country’s values.
“But we will not stand for assaults on police officers doing their job or for people feeling intimidated on our streets because of their background or the colour of their skin.
“Britain is a nation proudly built on tolerance, diversity and respect.
“Our flag represents our diverse country and we will never surrender it to those that use it as a symbol of violence, fear and division.”
Price and Reid were married for two years between 2010 and 2012.
Reid has been contacted for comment.
READ MORE: Clarkson’s Farm star Harriet Cowan was sifting through sheep poo after NTAs
