A man who was exposed to the nerve agent Novichok has regained consciousness after a "small but significant improvement", Salisbury District Hospital has said.
Charlie Rowley, who has been in hospital since falling ill in Amesbury on 30 June, is in a critical but stable condition. But the 45-year-old "is still very unwell", a statement said.
Dawn Sturgess, 44, who was also exposed to the nerve agent, died on Sunday. Her family have described her as "a gentle soul who was generous to a fault".
Police are investigating a possible link to the case of Russians Sergei and Yulia Skripal - who were poisoned with the same substance in nearby Salisbury.
The UK government has blamed Russia for the incident, but the country's authorities deny any involvement. Chief Medical Officer Dame Sally Davies said people in the Amesbury and Salisbury area should not "pick up any foreign object which could contain liquid or gel, in the interests of their own safety".