Russia hit back at the international community this morning, saying that accusations that its agents were responsible for the novichok attack on Salisbury were a "frank lie".

Read alsoNikki Haley slams Russia over novichok attack

Moscow was accused last night of "playing dice" with British lives after it was said that the dose of nerve agent brought into the UK was strong enough to kill 4,000 people.

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The amount of novichok in the perfume bottle used in the attempted assassination of a former Russian agent had been enough to cause "a significant loss of life", a security official told The Times.

Britain's most powerful allies at the United Nations have joined Theresa May in accusing Russia of being responsible for the attack.