[Alexei Navalny’s] body reacted differently to a fast-acting substance that was rapidly excreted from the body, which his friend Maria Pevchikh gave him. According to a source, she is also an employee (undercover agent) of the [British Secret Intelligence Service] MI6. So, it was the work of Maria Pevchikh. These substances have been in Russia for a long time. They don’t even need to be brought to Russia. They have been kept in the embassies of different countries since the 90s. And there are enough of them for many years. Several people have already died from these substances. However, it will never be possible to prove that it was precisely the poisoning.
What we are seeing regarding the allegations surrounding Navalny is a part and parcel of an ongoing, concerted, and vicious campaign against Russia, because Russia is a superpower and that’s what the Americans and the British loathe.
The claim advances recurrent pro-Kremlin disinformation narratives about the poisoning of activist Alexei Navalny, and Western Russophobia. There are no grounds for connecting either the US or the UK to Navalny's poisoning. The activist fell ill on a 20 August flight from Siberia to Moscow. Initially hospitalized in Omsk, he was transferred to the Charité hospital in Berlin at the request of his family. Clinical findings at the Charité hospital indicated that Navalny was poisoned with a substance from the group of cholinesterase inhibitors. Subsequent toxicological tests revealed the presence of a Novichok-type nerve agent in Navalny's blood. Polluting Western media environments with multiple contradictory narratives of a given event is an established strategy of pro-Kremlin media outlets. See here for an overview of, and similarities between, Russian disinformation campaigns surrounding the 2018 Skripal poisoning and the 2020 Navalny poisoning.