Ex-Russian spy Sergei Skripal and his daughter Yulia collapsed in Salisbury on March 4 after being exposed to the nerve agent Novichok. Both have since recovered.
Britain blamed Russia for the poisoning of Skripal, a former colonel in military intelligence who was jailed for betraying Russian agents to Britain's MI6 security service. He left Russia for England in a 2010 spy swap.
Russia has strongly denied involvement in the Skripal attack, sparking a diplomatic row that has led to tit-for-tat diplomatic expulsions between Britain and its allies and Russia.
Two Britons fell ill in June after being exposed to Novichok in the same region of southwest England, but police have not been able to establish whether the toxin was from the same batch used against the Skripals.
Charlie Rowley, 45, and his partner Dawn Sturgess, 44, collapsed at his Amesbury house within hours of each other on June 30.
Sturgess died on July 8, while Rowley has regained consciousness and is in a stable condition.
Business Standard has always strived hard to provide up-to-date information and commentary on developments that are of interest to you and have wider political and economic implications for the country and the world. Your encouragement and constant feedback on how to improve our offering have only made our resolve and commitment to these ideals stronger. Even during these difficult times arising out of Covid-19, we continue to remain committed to keeping you informed and updated with credible news, authoritative views and incisive commentary on topical issues of relevance.
We, however, have a request.
As we battle the economic impact of the pandemic, we need your support even more, so that we can continue to offer you more quality content. Our subscription model has seen an encouraging response from many of you, who have subscribed to our online content. More subscription to our online content can only help us achieve the goals of offering you even better and more relevant content. We believe in free, fair and credible journalism. Your support through more subscriptions can help us practise the journalism to which we are committed.
Support quality journalism and subscribe to Business Standard.