Yulia Skripal was discharged from hospital in April and her father was discharged in May.
Dawn Sturgess, 44, died on Sunday evening after more than a week on life support.
Earlier on Monday, Britain's top counter-terrorism officer said detectives were unable to say if the Novichok that poisoned Sturgess and a man who is in critical condition in a hospital was from the same batch that struck down the Skripals. Sergei and Yulia Skripal became seriously ill, but have both recovered. "Charlie is still very unwell and will continue to require specialist, round-the-clock care here at Salisbury District Hospital", the report says.
The BBC understands Mr Rowley's flat is regarded as the key location in the search.
They have tested and ruled out a bus on which the pair travelled on Friday night but are still examining a red Transit van in which Mr Rowley travelled on Saturday.
Iranian girl detained for posting dance videos , twitter erupts with outrage
Another person, Masih Alinejad , posted a video of herself defiantly dancing in a public park in Tehran. Last Friday, she and other detainees, whose identity could not be confirmed, appeared on Iranian TV.
It's not the first time a drink has been named after the deadly nerve agent.
Dmitry Peskov told reporters that Moscow "is deeply concerned" over the poisoning cases in Britain.
Police have not yet found any evidence that Ms Sturgess and Mr Rowley visited any of the sites that underwent decontamination following the attack on the Skripals in March'.
Sturgess and Charlie Rowley reportedly fell ill after coming into contact with Novichok on June 30, and Sturgess died days later.
Croatia beat Russian Federation on penalties to reach World Cup semis
And he did - sending Akinfeev the wrong way to send the Croats into their first World Cup semi-final since 1998. Ivan Rakitic scored the victor from the spot as Russian goalkeeper Igor Akinfeev dived the opposite direction.
The family of a woman killed by a nerve agent have paid tribute to a "gentle soul who was generous to a fault" as her boyfriend's condition improved slightly.
The backdrop to this meeting was British but the issue was global as police issued a Novichok warning to the residents of Salisbury.
Police are working on the theory that Mr Rowley and Ms Sturgess were poisoned when they handled the contaminated container after discovering it lying around in Salisbury.
The high temperatures mean they then have to be out of them again soon after before they overheat. In May, the UK's national security adviser Sir Mark Sedwill said authorities did "not yet" know who was responsible for the Skripal death, and no updates have been offered since.
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The head of Peshawar city police also informed media representatives that some 8 kilograms of explosives were used in the attack. Another party worker, Yaseen Khan, said a deafening explosion rocked the compound as Haroon Bilour shook hands with supporters.