Yulia Skripal, the poisoned daughter of Russian ex-spy Sergei, has been discharged from hospital, the BBC
The 33-year-old was discharged from Salisbury District Hospital on Monday and taken to a secure location.
Her 66-year-old father remains in hospital but his condition is "improving rapidly".
The pair were taken to hospital on 4 March after being exposed to the toxic nerve agent Novichok.
The father and daughter were found slumped on a park bench in the centre of Salisbury.
Wiltshire Police Det Sgt Nick Bailey, who attended the scene, was also treated in hospital after being exposed to the nerve agent, but has since been discharged.
A statement from Ms Skripal released through the Metropolitan Police last week said her "strength is growing daily".
Doctors treating the pair said Mr Skripal was "responding well to treatment, improving rapidly and no longer in a critical condition".
The UK government says Russia was behind the poisoning, and Prime Minister Theresa May said Moscow was "culpable" for attack.
But the Russian government denied any involvement and has accused the British of inventing a "fake story".
Police said the pair first came into contact with the nerve agent at their home.
BBC security correspondent Gordon Corera said the highest concentration was found on the Skripals' front door handle.
Traces of Novichok were also found at the Mill and Zizzi in Salisbury, where the Skripals spent the afternoon.
Investigators identified 131 people who had potentially been in contact with the nerve agent, and up to 500 people who visited the pub or the restaurant were told to wash their clothes and possessions.