Boris Johnson says ‘Putin must fail’ after Cobra meeting – as it happened

• 11.33pm GMT 23:33 A summary of today's developments
• 10.27pm GMT 22:27 Johnson: A 'dark day' for the continent after Ukraine invasion
• 7.18pm GMT 19:18 Labour MPs withdraw names from Stop the War open letter
• 6.58pm GMT 18:58 Johnson: Putin may face war crimes charges
• 6.32pm GMT 18:32 Johnson plays down prospect of Nato imposing no-fly zone over Ukraine
• 6.24pm GMT 18:24 Gazprom and Rosneft should have been included on sanctions list, say Lib Dems
• 6.21pm GMT 18:21 Foreign Office releases further details of sanctions package

18:58

Updated at 7.51pm GMT

You can follow our main blog on the developments in Ukraine here:

• Boris Johnson told ministers it is “a dark day in the history of our continent” following the invasion of Ukraine during a Cabinet meeting which followed a Cobra meeting. Johnson said Vladimir Putin has launched “a cynical and brutal invasion for his own vainglorious ends”, a No 10 spokesman said.

• Eleven Labour MPs who signed an open letter from the Stop The War Coalition that criticised Nato have now withdrawn their names. The PA news agency understands they were threatened with the removal of the whip if their names were not taken off the letter.

• Boris Johnson has signalled that Russia’s president, Vladimir Putin, could face war crimes charges over the invasion of Ukraine. He told MPs “anyone who sends a Russian into battle to kill innocent Ukrainians” could be brought to court. The prime minister added the UK is working with allies to set up a “particular international war crimes tribunal for those involved in war crimes in the Ukraine theatre”.

• Ed Davey, the Lib Dem leader and a former energy secretary, has criticised the government for not including the energy companies Gazprom and Rosneft in the sanctions list.

• The Foreign Office released a statement with more detail of the sanctions package unveiled by the PM. It says the government will: Freeze the assets of all Russian banks including, today, a full asset freeze on VTB, Russia’s largest bank. Co-ordinated with the US this is by far the single biggest financial sanction in history. Individuals and companies whose assets are frozen will be unable to undertake any business in the UK or with UK nationals. Prevent Russian companies from borrowing on the UK markets, effectively ending the ability of those companies closest to Putin to raise finance in the UK. This is in addition to banning the Russian state itself from raising funds in the UK, as previously announced.

Here is a selection of some other front pages from Friday’s newspapers.

The front page of Friday’s Guardian:

Video footage has emerged which appears to show military vehicles at the site of the nuclear power plant in Chernobyl.

Cyber experts have identified a new strain of computer-disabling malware unleashed on Ukrainian targets as part of Russia’s offensive, as the UK government and banks said they were on alert for online attacks.

Russia was widely expected to launch a cyber assault alongside its military campaign, and the run-up to the invasion of Ukraine was marked by the deployment of “wiper” malware . A distributed denial-of-service (DDoS) attack, which paralyses websites by bombarding them with spurious information requests, also hit Ukrainian government sites.

On Wednesday, ESET Research Labs, a Slovakia-based cybersecurity company, said it had detected a new piece of data-wiping malware on hundreds of machines in Ukraine.

The Cabinet was also briefed by the chairman of the Joint Intelligence Committee Sir Simon Gass and the Chief of Defence Staff Admiral Sir Tony Radakin.

The PM’s spokesman added: “The Prime Minister concluded by saying Putin must fail, and that the UK would work with its allies to achieve the restitution of the sovereignty of Ukraine.”

Boris Johnson told ministers it is “a dark day in the history of our continent” following the invasion of Ukraine during a Cabinet meeting on Thursday evening which followed a Cobra meeting.

Johnson said Vladimir Putin has launched “a cynical and brutal invasion for his own vainglorious ends”, a No 10 spokesman said.

“He said the UK could be proud of the actions it has taken so far, playing a leading role in Nato, developing a tough economic sanctions package together with our allies, and providing lethal defensive weaponry to the Ukrainian government,” he said.

“He told Cabinet that the Ukrainian military was fighting back in defiance of Putin’s attempts to subjugate Ukraine. And he pointed to protests within Russia which demonstrated that Putin’s actions would also face resistance from within his own country.”

The head of MI6 has said Russia’s attack on Ukraine was a “long planned, unprovoked, cruel aggression”. Richard Moore, known in Whitehall as C, tweeted that “US and UK intelligence communities uncovered Putin’s plans for Ukraine”.

He said: “We exposed his attempts to engineer ‘false flag’, fake attacks to justify his invasion. We revealed his plans to assassinate Ukrainian leaders and senior officials.