Some may have thought that support for these marches had now diminished.
They have been going for about four months and this is the eighth month.
But based on today's evidence, these perceptions may be far from reality.
Follow the live broadcast: Iraq warns of “catastrophic” consequences after US strikes
For 25 minutes, we watched a continuous crowd pass us on Regent Street.
We started our watch when the front line set out and they were going very fast.
But even after so long, we still cannot see the end – just an endless sea of Palestinian flags flying above our heads.
This time, the protesters started outside BBC headquarters before ending in Whitehall, where some were shouting “shame on you” outside the doors of Downing Street.
Protesters outside Downing Street
Among them was Kevin, from London, who told me he had attended every one of these marches.
“I am here to uphold international law,” he said.
“Someone has to stand up and say we've had enough. We need to stop this genocide now.”
But do the marches have any effect? There is no indication of any change in policy. The demonstrators' demands for a ceasefire remain unanswered.
“I think the government is already softening its stance behind the scenes. It has to because there is an election coming up,” Kevin said.
Police then said they made a “small number of arrests” – two for public order, one for obstructing police and one for lighting a smoke bomb/flare. The anger here was not only aimed at Rishi Sunak And his government.
I met Lesley and Jill, who had traveled from Devon to attend. On Jill's forehead is a sticker that says, “Just stop Starmer“.
“He is the opposition but he agrees with everything the government says and does,” says Gill.
Pic: PA
In contrast to the constant flux of the situation in the Middle East – the we Air strikes on targets linked to Iran are the latest example of this – the demands of the protesters have remained the same since the first of these marches in October.
Analysis: US strikes may have unintended and far-reaching consequences
End the war in GazaIn their view, it ends the broader regional conflict.
No wonder then how America's latest trends She backs down. “Unnecessary”, “extraordinary” and “appalling” were just some of the words used to describe it.
Please use Chrome browser for an easily accessible video player
The footage shows the American strikes and their consequences
According to Gill, the response was “disproportionate” because there was a “mad man” in the White House.
“what's he doing?” she asks.
He added: “There are Americans being killed in Gaza and they have done absolutely nothing about it, so they are being a bit selective about their retaliation.”
Read more: What we know about the sites targeted by US strikes
And speaking of revenge, there are many here who believe the issue will return with a vengeance when the US and UK go to the polls.
Joseph, who has marched five times, is certain the war in Israel will be an “election issue” here in Britain.
“It is very embarrassing for the government and the opposition because their positions are largely untenable,” he says.
How long will the marches last? “Whatever it takes.”
