During a reading of the two leaders’ appeal, a Downing Street spokesman said the two leaders also reiterated the need for European countries to reduce their dependence on Russian gas “a decision which, more than anything another, would strike at the heart of Russia’s strategic interests”. ”.
A Downing Street spokesperson said: “The Prime Minister and President Biden updated each other on their recent discussions with fellow world leaders. They agreed there remained a crucial window for diplomacy and for Russia to drop its threats to Ukraine.
“Leaders stressed that any further incursion into Ukraine would result in a protracted crisis for Russia, with massive damage for both Russia and the world.
“They agreed that Western allies must remain united in the face of Russian threats, including imposing a significant set of sanctions should Russian aggression escalate.”
They added: “The Prime Minister and President Biden have agreed to stay in close contact as the situation evolves.”
Russian-Ukrainian crisis: Boris Johnson urges Vladimir Putin to take a step back
Prime Minister Boris Johnson warned on Monday that an invasion could take place within 48 hours as he urged the Russian president to step back from the “edge of a precipice”.
Russia has accused the UK and US of a propaganda campaign and insisted it was ready to continue the talks.
The Prime Minister was being briefed on the latest intelligence from British spy chiefs and cut short a planned visit to northern England to lead a Cobra meeting on Tuesday.
Earlier today, Foreign Secretary Liz Truss chaired a Cobra meeting with the Prime Minister who is expected to chair one tomorrow on the ongoing crisis.
In a message to European allies, Mr Johnson said the world must demonstrate the political and economic cost an invasion would have for Russia, including ending dependence on its gas.
Prime Minister says ‘the world must learn the lesson of 2014’ when not enough was done to move away from Russian gas and oil following Russian action in the east of Ukraine and the annexation of Crimea.
“What I think all European countries need to do now is take Nord Stream out of the bloodstream,” he said.
“Tear off this hypodermic drip of Russian hydrocarbons that keeps so many European economies going.”
Downing Street said the package of sanctions that were about to be imposed on Russian entities would not be made public.
The Prime Minister’s official spokesman said: ‘We are not anticipating the types of sanctions we need to introduce as this cannot be beneficial to our objectives.
Truss defended his decision to travel to Moscow to meet his counterpart Sergei Lavrov.
The meeting ended with a tense press conference and claims Ms Truss confused two regions of Russia with parts of Ukraine.
Ms Truss told reporters: “I went to Russia to deliver a very clear message that Russia is the aggressor, they have 100,000 troops on the Ukrainian border and if they stage an incursion in Ukraine, it would have a detrimental effect on the Russian people and the Russian government.
“Of course the Russians didn’t like what I had to say but I’m saying it anyway.”