BBC Scotland's former political editor Brian Taylor has described today's announcements as a "remarkable set of events".

He tells the BBC News channel he believes the first minister did not want several weeks of indecision and uncertainty.

"He's decided to go on the front foot to presume that the pact is at an end and to call an end to that pact himself," Taylor says. "The advantage of that is it gives him the agenda, it gives him the control."

He adds that it also allows the government to concentrate on economic growth again.

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The collapse of the the Bute House agreement has been welcomed by some in the SNP.

Fergus Ewing, the SNP member for Inverness and Nairn and a long-time critic of the deal, gave his reaction to Radio Scotland's Lunchtime Live, saying: "Oh happy day."

He added: "I opposed the Bute House agreement from the start, arguing that the Scottish National Party, a party of government, would be damaged by association with a group of politicians who are widely seen as extremists.

"This is the opportunity for the SNP to go back to putting people first and supporting business, supporting economic growth, focusing on competence in government. Those were the ways we built up trust and confidence under Alex Salmond's leadership."

If you missed First Minister's Questions earlier, Scottish Conservative leader Douglas Ross told the chamber the "extreme" Greens should have been "nowhere near government".

Ross pointed to Humza Yousaf's leadership election promise to continue the Bute House agreement where he dubbed the power-sharing agreement with the Greens as "worth their weight in gold".

The Tory leader said: "This morning, he said it came to a natural conclusion. At what point in the last 48 hours did it come to it's natural conclusion? Or did Humza Yousaf panic because the extreme Greens were about to jump before he could dump them?"

The Scottish government's official spokesman has told a media briefing that the decision to scrap the power-sharing deal was made yesterday morning by Humza Yousaf.

The first minister met Scottish Greens co-leaders Patrick Harvie and Lorna Slater at 08:00 this morning to break the news.

The Cabinet then met at 08:30 for an hour and "enthusiastically endorsed the position", the spokesman said. They were banging tables in support, he said.

The spokesman said that for the sake of the country, the government and the SNP, it was the best thing to do at this stage.

He added that Humza Yousaf had "war-gamed" the no confidence vote scenario and it was considered in the course of his decision.

As political reaction continues to come in from Holyrood and beyond, Stephen Flynn has insisted this is a "good day for the SNP".

The SNP's Westminster leader said: “This is a good day for the SNP, it’s a good day for the Scottish government, and most important of all, it’s a good day for the people of Scotland.

“What the first minister has shown today is leadership by acting in the national interest and putting the people of Scotland first.”

Flynn added: “The people of Scotland of course elected us as a minority government and we are going to govern as a minority government, as we have done very successfully in the past.

“I have got absolute confidence, based upon what the first minister said today that the government is going to be fully focused on the priorities of the people of Scotland.”

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Scottish Green party co-leaders Lorna Slater and Patrick Harvie have placed the blame for undoing the "progressive" Bute House agreement solely on the first minister.

Speaking to the BBC's Politics Live programme, Lorna Slater said: "The first minister asked Patrick Harvie and myself to come along to Bute House for a conversation at which the first minister told us of his decision to end the Bute House agreement."

Asked whether the decision was solely the first minister's, Slater confirmed: "This was his decision."

She added that she feels the first minister has "caved" to the right wing of the SNP, to some of "the most regressive politics in Scotland and undone our progressive co-operation agreement".

In a statement prior to First Minister's Questions, co-leader Patrick Harvie spoke of this morning's meeting with Humza Yousaf and said it was "his decision" to end the power sharing agreement.

The SNP government is in no position to guarantee that Humza Yousaf will win the confidence vote the Conservatives are bringing against him.

If all opposition MSPs, which now include the Greens, vote "no confidence" in the first minister he would lose the vote.

Strictly speaking, that vote is not binding but politically he would more or less be obliged to resign and the prospect of an early Holyrood election would start to loom large.

So how could he survive this challenge?

If the Greens cool down over the next week and rather than voting against Mr Yousaf choose to abstain - or if any one opposition MSP could be persuaded to switch sides.

The SNP have 63 MSPs. Their opponents have 65 (the presiding officer is neutral). One switcher to the government could result in a tie in which the presiding officer (equivalent of the Commons speaker) would be expected to back no change.

If the government cannot engineer either of these scenarios Humza Yousaf’s political survival would be in serious doubt.

The Scottish Greens have said they will need to discuss in their MSP group whether they will back the first minister in a vote of no confidence.

Scottish Conservative leader Douglas Ross announced at FMQs that he is tabling a no confidence motion in Humza Yousaf as first minister.

Asked whether Yousaf would still be first minister next week, Scottish Greens co-leader Patrick Harvie commented that the first minister needed to command a majority in parliament and the Bute House agreement had been a way of achieving that.

It's been an extremely tough day for Humza Yousaf, but at least he won't face the no confidence vote until next week if Holyrood convention is followed.

Douglas Ross's motion requires the support of at least 25 MSPs and members are usually given notice of at least two sitting days before a vote takes place.

The Scottish Tories have 31 MSPs so we can expect the vote to go ahead.

At FMQs, Ross said Humza Yousaf was “unfit for office” after accused him of U-turning on the Bute House agreement.

The Scottish Conservative leader said Yousaf had shown he was “weak” after abandoning the power-sharing deal with the Scottish Greens just 48 hours after backing it.

He said: “This should be the end of the road for this weak first minister.”

The FM hit back with a barb inspired by a former prime minister, pointing out the Bute House agreement had "lasted 19 Liz Trusses".

Before FMQs, the Scottish Greens spoke to the press in the lobby at Holyrood following their meeting at Bute House with the first minister.

Greens co-leader Patrick Harvie said Humza Yousaf's position is a "total U-turn" compared with his statements in recent weeks and days.

"The first minister has decided to capitulate to the most reactionary, backward-looking forces within the SNP, and it's the opposite of what's in Scotland's best interests."

Co-leader Lorna Slater said Scotland needs parties who are willing to co-operate in the best interests of the country and future generations.

"We remain committed to that kind of politics," she said.

"Sadly, it seems we are the last party in Scotland to hold those values."

"That got a thumping endorsement from the four Liberal Democrat MSPs in this chamber," hits back the FM.

In terms of coalitions, "we should probably remember the lesson of the Liberal Democrats" and its "disastrous coalition with the Conservatives", Humza Yousaf adds.

Back to FMQs and Alex Cole-Hamilton, not surprisingly, also focuses on the collapse of the Bute House agreement.

The Scottish Lib Dem leader raises a laugh in the chamber by asking his standard FMQs question "when will the cabinet next meet?"

He adds: "The two partners to this failed agreement are at each other's throats."

They have both failed the people of Scotland, he says.

Cole-Hamilton lists what he sees as the failures of the two parties - including "cutting the NHS off at the knees", junked climate targets and failed ferries.

"We need an end to this entire government," he declares.

"When will Humza Yousaf finally look at himself in the mirror and say, I am the problem - it's me."

If you're just joining us, here are the headlines so far on a tumultuous day in Scottish politics:

• The SNP's power-sharing deal with the Scottish Greens has been scrapped
• The Greens said the SNP had "sold out future generations"
• It follows the government's decision to scrap key climate targets and a pause on the prescription of puberty blockers for under-18s
• The SNP will now form a minority government

• In a Bute House press conference, FM Humza Yousaf confirmed he is terminating the Bute House agreement "with immediate effect"
• While saying he was proud of the deal and that it had achieved successes, Yousaf said it had served its purpose" and it's in the SNP's best interest to pursue a different arrangement
• The first minister insisted he's here to stay - denying he is "heading for the exit door"
• The collapse of the deal dominates FMQs, with Scottish Tory leader Douglas Ross telling the chamber he is lodging a vote of no confidence in Humza Yousaf
• The FM hits back by attacking the Tory record in government at Westminster
• Scottish Labour leader Anas Sarwar accused Yousaf of being "weak, hopeless and untrustworthy" and calls for a Holyrood election
• Again Yousaf went on the attack, acccusing Sarwar of flip-flopping on issues and being dictated to from London

So, Scottish Tory leader Douglas Ross is to lodge a vote of no confidence in the first minister

Any of Holyrood’s MSPs can attempt to force a vote of no confidence in the Scottish government or its ministers.

The vote will be brought to the Scottish Parliament’s chamber if it's supported by at least 25 MSPs.

Douglas Ross can count on the support of his 31 MSPs at least, so the vote should go ahead.

Usually members are given notice of at least two sitting days before a vote takes place – meaning Humza Yousaf could face a confidence vote next week.

The SNP has 63 seats in the Scottish Parliament while all the other parties together have 66.

Yousaf says that a general election is coming and, when it does, he will be able to look in the whites of the eyes of the people of Scotland on every doorstep in the country and say that they should vote for a party whose values "are the people of Scotland's values".

He said: "Our actions are estimated to lift 100,000 children out of poverty. That's a party that has chosen investment in the NHS over tax cuts for the wealthy."

He says Sarwar once believed in the same values "but he has of course flip-flopped and ditched those principles because that's what his bosses in London told him to do".

Sarwar says that despite the first minister's assurances that the ending of the Bute House agreement is a sign of strength, "the louder he shouts, the weaker he sounds".

He adds that "for once people agree with Lorna Slater" and says the first minister is "weak, hopeless and untrustworthy".

The Scottish Labour leader says the challenges facing Scotland have never been so great, while its leadership has never been so weak.

Sarwar says that one in seven Scots is on an NHS waiting list as the first minister "fails to get a grip".

"The people of Scotland can see the SNP have lost their way. They're weak, divided and incompetent and putting party before country.

"The people of Scotland didn't vote for this mess and this chaos - so isnt it time to end the circus and call an election?" Sarwar asks.

The first minister replies to Sarwar by saying that not content with "stealing Tory policies", Sarwar is now "nicking Tory lines".

Yousaf says Sarwar once described lifting the cap on bankers' bonuses as "morally repugnant" but "of course when Keir Starmer does it, Anas Sarwar like a good boy falls into line".

He said: "Isn't it the case that the only principles Anas Sarwar has are the principals Keir Starmer tells him he's allowed to have?"

Sarwar responds: “ I am happy for the first minister to delude himself that everything is going well and he’s having a great week – keep it up, first minister.”

He says the first minister has been forced into a “humiliating U-turn and he knows it”.

The Scottish Labour leader adds Yousaf previously said he couldn't imagine being the leader of the SNP and “destabilising” the government by going into a minority government, which would be "truly foolish".

“Does he feel foolish today?” he asks the first minister.

The first minister responds to Anas Sarwar, saying this week has seen approval for the world's largest commercial floating offshore wind project, putting Scotland “at the very forefront” of offshore wind development globally.

Yousaf says: “Whether it's at Westminster, whether it's at Holyrood, whether it's in councils across the country, Labour is guilty of not just the worst type of political cowardice, they are guilty of hypocrisy and frankly climate denial when the SNP is taking the action that is necessary.”

Scottish Labour leader Anas Sarwar also begins his questions to the first minister by probing Yousaf on the breakdown of the Bute House agreement.

Sarwar says that not only have climate targets been “abandoned” but the only two green jobs to have been created – the ministerial roles of Lorna Slater and Patrick Harvie – have come to an end.

He says with the government's record of “failure and incompetence”, people across Scotland will be asking why only two ministers have lost their jobs today.