The paper said its sources believed Britain would want to ensure their safety by resettling them in one of the so-called "Five Eyes" countries, the intelligence-sharing partnership that also includes Australia, the US, Canada and New Zealand.
"The obvious place to resettle them is America because they're less likely to be killed there and it's easier to protect them there under a new identity," it quoted what it called an intelligence source familiar with the negotiations as saying.
"There's a preference for them to be resettled in a Five-Eyes nation because their case would have huge security implications," the source added.
Britain's Foreign Office had no immediate comment on the report.
Relations between Russia and Britain have plunged to their lowest in decades since the pair were found slumped unconscious on a bench in Salisbury on March 4.
Yulia, a Russian citizen, had arrived in Britain only the day before to visit her father, who has been living in Britain for some seven years.
Both were found by Britain to be suffering from the effects of poisoning by a nerve agent but they are now recovering in hospital.
- Reuters, AAP
