The home of Novichok poisoning victim Charlie Rowley has been declared safe - six months after he and his partner Dawn Sturgess were exposed.
The flat in Muggleton Road, Amesbury, was cordoned off after Mr Rowley and Ms Sturgess came into contact with a perfume bottle believed to have been used in the attack three months earlier on former Russian spy Sergei Skripal and his daughter Yulia.
The Skripals survived the attack, as did Mr Rowley, but Ms Sturgess died in hospital in July.
The South Wiltshire Recovery Coordinating Group said the first-floor flat had been declared safe by DEFRA following extensive cleaning and testing by specialist teams.
It has now been handed back to its owners, Stonewater Housing.
There is now just one remaining site - the home of Mr Skripal in Christie Miller Road, Salisbury - still undergoing decontamination.
Work resumed earlier this month to dismantle and replace the house and garage roofs of the property.
Detectives believe Mr Skripal and his daughter first came into contract with the poison when it was sprayed on the door handle of the house.
Alistair Cunningham, chairman of the South Wiltshire Recovery Coordinating Group, said: “This is positive news for Amesbury and marks a return to normal, as all sites in the town have now been handed back to their owners following specialist cleaning.
"We recognise that there is still work to be done to increase visitor confidence and to continue to support the local community.
"We are working with local and national partners to implement a programme of events and initiatives in both Salisbury and Amesbury to encourage shoppers, visitors and tourists."
A Defra spokesman added: "The thorough work to decontaminate the site at Muggleton Road, Amesbury, has been successfully completed.
"Following extensive testing, we have declared the site safe and handed it back to Wiltshire Council.
"We are grateful for the residents of Muggleton Road for their understanding while this work has been carried out."