Russian diplomats were expelled over the poisoning of Alexander Litvinenko, the former intelligence agent who died after being attacked with radioactive polonium. Britain said the Russians being expelled were undeclared intelligence officers.
The head of Russian state-funded RT television says British Prime Minister Theresa May is to blame if British media are kicked out of Russia over the poisoning of an ex-spy.
Britain has expelled 23 Russian diplomats and suspended high-level contacts with Moscow due to the incident.
Russian Federation has refused Britain's demands to explain how Novichok, a nerve agent first developed by the Soviet military, was used to strike down Sergei Skripal and his daughter Yulia in the southern English city of Salisbury.
Moscow has mostly shrugged off the measures announced by May, ridiculing the prospect of the termination of high-profile visits. A report Friday in the Telegraph says it was put in the suitcase of Skripal's daughter before she left Russian Federation for Britain to see her father.
"President Macron said that France completely shares the U.K.'s assessment that there is no plausible explanation other than that Russian Federation was responsible for the attack and he once again expressed his full support for the U.K.as a close and strong ally", the statement said.
Russian Federation has denied involvement in the poisoning and RT, which says it covers stories overlooked by the mainstream media, has criticized Ofcom's position. U.S. President Donald Trump said it looked as though the Russians were behind it.
Russian Federation has dismissed the accusations as "fairy tales" and denied any involvement in the attack which landed the Skripals, along with a British police officer, in the hospital.
While May pledged to disrupt Russian espionage and "hostile state activity", she gave few details about how hard Britain would hit Russian politicians and oligarchs where it really hurts - in their wallets.
Russian Federation described the UK's position as irresponsible and not backed up by evidence.
"The Met Police's Counter Terrorism Command, which has led the investigation from the outset, is now treating Mr. Glushkov's death as murder", the statement said. Most statements have fallen somewhere in between the two extremes.
In London, opposition Labour Party leader Jeremy Corbyn struck a starkly different tone to that of the British government by warning against rushing into a new Cold War before full evidence of Moscow's culpability was proven.
Vil Mirzayanov, who now lives in New Jersey, is quoted in Novaya Gazeta as saying it's unlikely the nerve agent came from another former Soviet country.
Other actions being pushed by Britain include legislation enabling it to detain people suspected of hostile state activity - the powers are now restricted to its ability to detain those suspected of terrorism - and a strengthening of the state's ability to impose sanctions in response to violations of human rights, similar to the U.S.'s Magnitsky Act.
More: Who is Sergei Skripal?
A senior aide to the Polish prime minister said on Wednesday that Poland was ready to help the United Kingdom solve the case of the suspected poisoning.
Polish President Andrzej Duda said on Wednesday that those responsible for the suspected nerve gas attack in Britain "should be identified and punished."