Yulia Skripal was kidnapped by the British secret service so she could not testify about what really happened to Russian diplomats, and she is not allowed to talk to her family, for example her cousin Viktoria Skripal.
The Kremlin backs an objective investigation into this situation to provide trustworthy data, and so that we don’t rely on rumors and fake media reports. We believe that this information on such awful consequences of using chemical weapons in [Syria’s] Douma is not based on real data.
Actually, the Russian ambassador to the United Nations in the U.N. Security Council has systematically blocked resolutions calling for joint international investigations of chemical weapons use in Syria. Six times, Russia has exercised its vetoes on Syria in chemical weapons-related resolutions research.un.org/en/docs/sc/quick/, , the most recent one on the 10 of April www.un.org/en/ga/search/view_doc.asp?symbol=S/2018/321,
Further debunking by Polygraph.info www.polygraph.info/a/un-resolutions-russia-vetoed-syria-chemical-weapons/29159737.html,