Dear, UK still has no proof of using Novichok... since 2018... how many propaganda has been published, and still no any court decision...
When Navalny was "poisoned" (according to Western propaganda) for the first time, he went to Germany for treatment, where they took all possible tests: blood, urine, hair, skin, clothes. And still no official statements. Do you think they would have kept silent if they had found even the slightest evidence?
When Navalny died in the colony, his body was given to his relatives and they allowed him to send it abroad. And since then, there have been no statements from specialists. Do you think they are hiding the truth from you?
After the first use of chemical weapons by Ukraine, Russia collected evidence and handed it over to the OCPW. So they are silent. Because otherwise there will be a scandal.