"The results of analysis by OPCW-designated laboratories of environmental and biomedical samples collected by the OPCW team confirm the findings of the United Kingdom relating to the identity of the toxic chemical that was used in Salisbury and severely injured three people", the OPCW said.
The United Kingdom of Great Britain and Northern Ireland requested technical assistance from the OPCW Technical Secretariat (hereinafter “the Secretariat”) under subparagraph 38(e) of Article VIII of the Chemical Weapons Convention in relation to an incident in Salisbury on 4 March 2018 involving a toxic chemical—allegedly a nerve agent—and the poisoning and hospitalisation of three individuals. The Director-General decided to dispatch a team to the United Kingdom for a technical
assistance visit (TAV).
The TAV team deployed to the United Kingdom on 19 March for a pre-deployment and from 21 March to 23 March for a full deployment.
The team received information on the medical conditions of the affected individuals, Mr Sergej Skripal, Ms Yulia Skripal, and Mr Nicholas Bailey. This included information on their acetylcholinesterase status since hospitalisation, as well as information on the treatment regime.
The team was able to collect blood samples from the three affected individuals under full chain of custody for delivery to the OPCW Laboratory and subsequent analysis by OPCW designated laboratories, and conducted identification of the three individuals against official photo-ID documents.
The team was able to conduct on-site sampling of environmental samples under full chain of custody at sites identified as possible hot-spots of residual contamination.
Samples were returned to the OPCW Laboratory for subsequent analysis by OPCW designated laboratories.
The team requested and received splits of samples taken by British authorities for delivery to the OPCW Laboratory in Rijswijk, the Netherlands, and subsequent analysis by OPCW designated laboratories. This was done for comparative purposes and to verify the analysis of the United Kingdom.
The team was briefed on the identity of the toxic chemical identified by the United Kingdom and was able to review analytical results and data from chemical analysis of biomedical samples collected by the British authorities from the affected individuals, as well as from environmental samples collected on site.
The results of analysis of biomedical samples conducted by OPCW designated laboratories demonstrate the exposure of the three hospitalised individuals to this toxic chemical.
The results of analysis ofthe environmental samples conducted by OPCW designated laboratories demonstrate the presence of this toxic chemical in the samples.
The results of analysis by the OPCW designated laboratories of environmental and biomedical samples collected by the OPCW team confirm the findings of the United Kingdom relating to the identity of the toxic chemical that was used in Salisbury and severely injured three people.
The TAV team notes that the toxic chemical was of high purity. The latter is concluded from the almost complete absence of impurities.
The name and structure of the identified toxic chemical are contained in the full classified report of the Secretariat, available to States Parties.