Downing Street has ordered a blanket ban on UK Government departments engaging with Greenpeace as tensions with the charity increased after activists staged a protest at Rishi Sunak's home.
The Prime Minister's official spokesman said the pressure group should not be given a "seat at the table" in Whitehall discussions following the stunt last week.
Activists climbed on the roof of Mr Sunak's North Yorkshire manor house and draped oil-black fabric over the property in protest at his plan to grant new North Sea drilling licences.
Five people were arrested and have since been released on bail while police investigate.
It is understood the Department for Energy Security and Net Zero was already under strict orders from Grant Shapps, the Secretary of State, not to meet with Greenpeace.
The update from No 10 means all other departments will now be expected to suspend their engagement.
Talks in the past
The Telegraph says it is likely that the majority of past contact with Greenpeace was led by Defra, although the Foreign Office has held talks with the charity in the past.
In 2013, Lord Hague, then foreign secretary, spoke to the group's leaders after six British nationals were detained by Russia for their involvement in a protest against oil drilling in the Arctic.
Greenpeace ativists climbed on the roof of Mr Sunak's North Yorkshire manor house
On Monday, Mr Sunak's spokesman said: "Certainly we obviously don't think that people who are accused of breaking the law should have a seat at the table in discussions with government.
"My understanding is that Defra aren't engaging with Greenpeace because of those actions.
"I don't think it's unusual for Defra or other agencies to engage with climate action groups - that's taken place for a number of years.
"But clearly given their actions and the arrests last week we don't think it's appropriate to engage with them."
'Consequences'
Asked if they too would blacklist Greenpeace, Labour said there should be "consequences" for targeting the homes of politicians.
A party spokesman said: "It's the duty of government to engage with a wide range of organisations, including those they disagree with, however it's also right that such organisations know that the tactics they choose will have an impact on how they are seen and engaged with.
"The stunt at Rishi Sunak's house was totally unacceptable and there should be consequences for choosing to target politicians' families and homes."
Meanwhile, Labour leader Sir Keir Starmer says Just Stop Oil's message to turn off the taps in the North Sea is "contemptible".
He has sought to distance himself from Just Stop Oil as the Tories attack Labour for accepting donations from the campaign group's backer Dale Vince.
Sir Keir said he would only ban the granting of new licences to explore oil and gas fields in the North Sea as he seeks to give businesses certainty.
And the protest group which halted the Men's Elite Road Race will not target the UCI World Cycling Championships in Scotland again.
The BBC says This Is Rigged made the pledge after four people appeared in court charged with stopping the race for about 50 minutes on Sunday.