The prime minister warned that Vladimir Putin appeared intent on “taking over” Ukraine and “creating a pretext for a full-scale offensive.”
Speaking in a statement in the House of Commons, Mr Johnson said the UK was currently imposing sanctions on the following four Russian banks: Russia, IS Bank, Genbank and Chernomorsky Bank.
The Prime Minister also announced sanctions against three very wealthy people: Gennady Timchenko, Boris Rotenberg and Igor Rotenberg.
Any assets they own in the UK will be frozen, those concerned will be banned from entering here and all UK individuals and entities will be banned from doing business with them.
He said: “By denying the legitimacy of Ukraine as a state and presenting its very existence as a mortal threat to Russia, Putin is creating a pretext for a full-scale offensive. “It will be hard for respected members to imagine how in 2022 a national leader can calmly and deliberately plan the destruction of a peaceful neighbor, but the evidence from his own words suggests that this is exactly what Putin is doing.
“When I said on Saturday that his plan to blow up and invade Ukraine was already in motion before our eyes, the events of the last 24 hours, alas, showed that this was true.
“Now we have to prepare for the next possible phases of Putin’s plan: violent sabotage in areas of eastern Ukraine by Russian operatives and their mercenaries, followed by a general offensive of almost 200,000 Russian troops gathered on the borders, in maximum readiness for the offensive. attack.
“If the worst happens, then the European nation of 44 million men, women and children will be the target of a full-scale war of aggression, waged without the slightest justification for the absurd – even mystical – reasons that Putin described last night. “.
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The Prime Minister said that the sanctions were only the “first tranche” and more sanctions are on the way.
Mr Johnson also told MPs the UK will work with its allies and not “allow Putin to pull our continent back into its natural Hobbesian state, where aggression pays and force is the right thing to do.”
He added: “And it is precisely because the stakes are so high that Putin’s venture in Ukraine must eventually fail – and everyone will notice that they have failed.
“This will require the persistence, unity and determination of the entire western alliance, and the UK will do everything possible to keep this going. And now our thoughts must turn to our valiant Ukrainian friends who threaten no one and ask for nothing. except to live in peace and freedom.”
This happened due to the fact that German Chancellor Olaf Scholz took an important step by blocking the certification of the Nord Stream 2 gas pipeline, which would supply gas directly from Russia to Germany.
Earlier, at an emergency meeting of the UN Security Council, British Ambassador Dame Barbara Woodward said that the invasion would unleash “the forces of war, death and destruction” on the people of Ukraine.
Dame Barbara added: “The humanitarian impact will be dire for civilians fleeing the fighting. We know that women and children will suffer the most.
“Russia has put us on the brink. We call on Russia to back down.”
The Kremlin insisted that Russian forces would “keep the peace” in eastern Ukraine.
On Monday evening, Ukrainian President Volodymyr Zelensky told his people that “we are not afraid of anyone.”
The European Union and the United States have also imposed sanctions in response to the crisis.