Tory MP Mark Field has been filmed removing a protester who was part of a climate change demonstration disrupting a speech by Philip Hammond.
In live televised footage the Westminster MP could be seen to grab one of the protesters before marching her out the room in Mansion House, in the City of London.
It came as the Chancellor was delivering a speech on Brexit's economic impact at the annual Bankers and Merchants Dinner at Mansion House.
Greenpeace said 40 of its volunteers "gate-crashed " the event and "drowned out" the Chancellor's speech in order to raise awareness about climate change.
Television footage showed several women wearing red dresses and sashes emblazoned with the word "climate" were seen being ushered out of the banquet hall as attendees in black tie looked on.
Following the protest a City of London Police spokesman said no arrests had been made.
Several minutes of disruption was caused to the City of London event, which was attended by around 350 guests.
Afterwards Mr Hammond said: "The irony is that this is the Government that has just led the world by committing to a zero carbon economy by 2050."
His comment was met with applause.
Areeba Hamid, climate campaigner for Greenpeace UK, said: "This is a climate emergency. Business as usual is no longer an option.
"The real bottom line, the priority that needs to come before all others, is not profit, revenue or growth, but survival.
"That needs to be recognised in every boardroom and on every balance sheet, starting with the Chancellor's.
"The people in this room have been funding climate change, and we're not giving the banks and hedge funds a pass for their unethical investment decisions anymore.
"The Treasury is the Government's banker. It plays the same role propping up vested interests and blocking progress on climate change.
"But science demands a radical programme of policy interventions and public investment if our economy is to survive the coming storm.
"The serious, sensible, grey-suited grown-ups in the room ignored the warning signs and crashed the economy in 2008. We can't afford to let them crash the climate too."
A City of London Police spokesman said: "We were alerted at 9.03pm. We were called by security at Mansion House who let us know there were a group of protesters who had gained entry and were refusing to leave.
"Officers arrived to help with their ejection. Once in the presence of the police, the protesters were co-operative and left the premises.
"No arrests were made."