A protester has been hauled offstage after disrupting a speech by Tory heavyweight Jacob Rees-Mogg to warn about "fascism".
The drama unfolded moments after the former Business Secretary started his address - when a man joined him at the lectern and told the audience: "I would like to draw your attention to a few characteristics of fascism."
He was unable to continue making his point as security staff dragged him out the door.
Climate change protest group Extinction Rebellion later claimed credit for the disruption.
Audience members at the National Conservatism Conference - a gathering of right-wingers worried about creeping Marxism - appeared unmoved by the man's efforts, applauding his removal from the room.
Mr Rees-Mogg said: "There we go, a jolly good fellow has had to leave."
Extinction Rebellion posted on Twitter: "This morning, an ordinary person stepped onto the stage and interrupted Jacob Rees-Mogg's opening speech at the National Conservatism conference."
The action was the highlight of a rambling speech by the former cabinet member, which saw Mr Rees-Mogg hit out at the Government's decision to scale back plans to scrap EU laws.
He claimed that the repeal of EU laws so far has been "pathetically under-ambitious" in a fresh swipe directed at Rishi Sunak.
He said it was "very unfortunate" that Mr Sunak had broken his promise to wipe EU laws off the statute books, and pointed a finger of blame at civil servants.
He said: "The surrender to the blob risks exposing the Government to ridicule."
But he conceded that voter ID was a Tory own goal after members of the public were turned away at polling stations earlier this month.
But Mr Rees-Mogg claimed the Tories were worst hit, saying: "Parties that try and gerrymander end up finding their clever scheme comes back to bite them, as dare I say we found by insisting on voter ID for elections.
"We found the people who didn't have ID were elderly and they by and large voted Conservative, so we made it hard for our own voters and we upset a system that worked perfectly well."
As a minister, Mr Rees-Mogg defended the introduction of voter ID in Parliament.
But Mr Rees-Mogg - a prominent supporter of shamed former PM Boris Johnson - warned that it was "essential" to support the Government because "the alternative is far worse".
The Tory right-winger is one of the star turns of the event in central London today, where conspiracy theorists and culture warriors outline how they plan to lurch the UK to the right.
Among those set to appear are Donald Trump-backed senator JD Vance, who has called for a ban on abortion and appeared to support the far-right Great Replacement theory.
This idea, popular among white supremacists, holds that white American voters are being deliberately replaced by people from different ethnic groups.
Other controversial figures appearing at the conference include historian David Starkey, who has repeatedly provoked a backlash with his comments about race.
Most recently he claimed Rishi Sunak is "not fully grounded" in British culture.
National Conservatism is a global movement which claims that traditional values are being "undermined and overthrown". Its principals include addressing a "marked decline" in marriage and birth rates, and has called for restrictions on immigration.
This is the first time a conference has been held in the UK, but speakers at previous international events have included Hungarian autocrat Viktor Orban, US rabble-rouser Ron DeSantis and far-right Italian PM Giorgia Meloni.
