The deadline has passed for Russian president Vladimir Putin to explain how a nerve agent developed by the former Soviet Union was used against a former Russian double agent who passed secrets to British intelligence.
Sergei Skripal and his daughter Julia are in a critical condition in hospital after being found unconscious outside a shopping center in the Southern English City of Salisbury.
UK correspondent Gavin Grey reports that the stakes are high, as Putin is saying 'don't threaten a nuclear state' and has threatened that if the UK introduces tariffs or measures against Russia, Russia will introduce retaliatory measures.
What is open to Theresa May, the UK Prime Minister is today she meets the senior intelligence chief and her cabinet and she will then go to parliament and brief MPs and probably announce measures.— Gavin Grey, UK correspondent
He doesn't think May will just say 'let's wait and see', but rather believes she will immediately announce measures that might see an expulsion of diplomats, curbs on TV station Russia Today, a possible boycott of the World Cup and freezing of assets.
That could have a huge impact on businesses. It could be a very interesting time for the business community.— Gavin Grey, UK correspondent
Listen below to the report on what Putin missing the deadline means: