>> That Russia was responsible.>> The UK says a Soviet-developed toxin was used to poison a former Russian spy on British soil and has demanded an explanation from the Kremlin, but Moscow said on Tuesday that it's going to ignore that ultimatum. That is until the U.K. hands over samples of the alleged nerve agent used in the attempted murder of Sergei Skripal and his daughter Yulia, something Moscow says is an obligation under the chemical weapons convention.
> Before issuing ultimatums to report before the British government within 24 hours, it's better to follow your own obligations in accordance with international law. In this case, with the Chemical Weapons Convention and in general, speaking about manners, it's good to remember that the era of colonialism is a thing of the past.
>> Sergei and Yulia remain in a critical condition in hospital, after being poisoned with a nerve agent in the English city of Salsbury. The British government has identified the poison as part of the Novichok group of nerve agents developed by the Soviet military during the 1970s and 80s.
Prime Minister Theresa May said it is highly likely Russia is to blame, Walter Alistair Smart in London is following the story.>> British Prime Minister Theresa May has promised to have even more extensive measures than were taken last time something like this happened in the Alexander Litvinenko case.
Then there were some expulsions of diplomatic staff, there was a cessation of security cooperation and also they reviewed how the visa situation worked. They will also be looking for support from international partners and I think in terms of having the international sanction element to it, a lot will depend on what EU and NATO and obviously United States are prepared to back Britain up in doing.
>> The EU has expressed solidarity with the UK but diplomats told Reuters there is little appetite for more economic sanctions on Moscow. Meanwhile, the situation now so tense that the as yet unexplained death of a Russian exile in south London on Monday sparked more speculation, despite Scotland Yard announcing there was no evidence of a link to the Skripal poisoning.