The British government further says that the Russian government is responsible for the incident and has announced penalties against the country.
A comparable incidents happened in 2001 in the United States. Envelopes with Anthrax spores were sent to various politicians. Some people died. The White House told the FBI to blame al-Qaeda but the Anthrax turned out to be from a U.S. chemical-biological weapon laboratory. The case is still unsolved.
The 'whistle-blower' Vil Mirzanyanov who 'revealed' the 'Novichok' program and its poisons published chemical formulas that should enable any decent laboratory to reproduce them. But neither the existence of the claimed program nor the existence of the alleged substances were ever accepted by the scientific community. The Russian government says it does not know the program nor the alleged poisons.