Home Secretary Suella Braverman was interrupted twice by protesters as she gave a keynote speech at the National Conservatism conference in Westminster on Monday.
The cabinet minister had barely begun speaking when a man in the middle row stood up and identified himself as a member of Extinction Rebellion.
He was quickly bundled out of the hall by security as he shouted at Ms Braverman.
Moments later, a woman stood up and started asking the Home Secretary questions before she too was hauled out.
“Anyone else?” Ms Braverman said to applause.
She added: “It’s audition day for the shadow cabinet.”
Extinction Rebellion later confirmed they were behind the protests, accusing the Government of “demonising migrants” and “criminalising peaceful protests”.
It came just hours after Tory MP Jacob Rees-Mogg had his keynote speech interrupted by an activist protesting the Illegal Migration Bill.
Shortly after Mr Rees-Mogg began speaking, a man joined him at the lectern and said: “I would like to draw your attention to a few characteristics of fascism.”
The protester was then hauled off stage by security.
One of the protesters, who was not named by Extinction Rebellion, said: “National Conservatism says it wants people to bind together over national identity to let them flourish, but we’ve heard our politicians and seen their policies.
“We know they let rich people get richer with obscene corporate dividends while our waters are filled with sewage and our NHS is underfunded.
“They scapegoat the voiceless when they should be tackling the climate emergency that spells immediate disaster to millions of people and animals.”
During her speech, Ms Braverman claimed that Conservatives were “sceptical of self-appointed gurus, experts and elites”.
She told the conference that Tory members “prize experience, judgment and wisdom,” saying she would rather be governed by the first 2,000 people in the telephone directory than by the Harvard University faculty.
“Measuring diversity only on the basis of skin colour, sex and sexuality is mindbogglingly myopic. Identity politics is the politics of grievance and division.”
Elsewhere during her address, Ms Braverman argued that “mass and rapid migration is unsustainable in terms of housing supply, public services or community relations”.
She added: “Absorbing more and more people means building more and more homes is another one of those unfashionable facts that the open-borders brigade would say means we’re starting a culture war.
“It’s not racist for anyone, ethnic minority or otherwise, to want to control our borders.”
