Russia posied to expel British diplomats over Skripal case

Russia has reacted angrily to Theresa May's decision to expel 23 diplomats from the UK.

In an interview with Russian news agency Sputnik, Foreign Minister Sergei Lavrov said Russia would definitely eject British diplomats in retaliation.

Earlier, a foreign ministry spokeswoman had described the allegations of Russian involvement in the poisoning of Sergei Skripal as "insane", and accused the UK of failing to cooperate with Moscow in investigating the incident.

"We plan to introduce reciprocal steps. They are currently being worked on and will be adopted in the near future," Maria Zakharova said.

Novichok

Experts have claimed that novichok, the nerve agent used on Skripal, has only ever been produced at a single site in Russia.

However Russia told the UN security council that it has never made novichok.