Dawn Sturgess, 44, fell ill in Amesbury months after the incident and died in hospital in July after coming into contact with a perfume bottle believed to have been used in the attack on the Skripals and then discarded.
Her partner, Charlie Rowley, 45, was also exposed to the same nerve agent but was treated and discharged.
Two Russian nationals have been accused of travelling to the UK to try to murder Mr Skripal with Novichok.
Evidence gathered by intelligence agencies led the Government to conclude that the men were officers from the Russian military intelligence service, the GRU.
The two suspects - known by their aliases Alexander Petrov and Ruslan Boshirov - were caught on CCTV in Salisbury the day before the attack.