Sergei Skripal, am old-time traitor who moved from Russia to UK long ago, was nerve-poisoned in London just before the Presidential elections in Russia. Though anyone who has brain understands that this is a political provocation by British secret service, UK PM Theresa May was quick - without any evidence - to blame it on Russia in her no-sense anti-Putin campaign.
While all intelligent people laughed at her and her stupid attempt, a Russian TV show made a great joke of it. They say, it's like asking Theresa May what she feels when she steals sausages in a supermarket. If she claims she never steals sausages, one should respond, "We all know that you steal sausages. The question is not whether you steal or not. The question is what you feel when you steal sausages. You must give us a comprehensive explanation within 24 hours or otherwise face tough consequences!"
By making these allegations against Russia, Theresa May, actually, acknowldged that it were British Secret Service who committed that crime. How? She said that the the neural gas was identified as Russia-made. The only way to identify a chemical gas is to have a sample. So, UK has that gas. All one need now is to identify who has access to that gas and that's it - it's easy afterwards to find out who in UK committed that crime and who assisted tham.