The Skripals have been kidnapped and isolated from the rest of the world in order to keep them silent. London is afraid that Sergei Skripal will tell journalists the truth about what really happened.
No evidence given. This is a recurring pro-Kremlin narrative about the Salisbury attack.
British police have presented a solid chain of evidence about the Skripal case, including pictures, that connects the two suspects to particular locations in the case. Parts of the material have been released to the public.
This is one of many competing and contradictory stories promulgated by Russian state-controlled media about the Skripal poisoning.