UPDATE Pauline Cafferkey has now been discharged from hospital.
On Sunday doctors at London's Royal Free were happy that she was no longer infectious.
“The Ebola virus can only be transmitted by direct contact with the blood or bodily fluids of an infected person while they are symptomatic,” a spokesperson said.
Pauline Cafferkey, the Scottish nurse who contracted Ebola while volunteering in Sierra Leone in 2014, was flown to a specialist hospital due to a "late complication" related to the virus on Tuesday.
She was due to be flown in a Hercules plane to RAF Northolt before being driven to the Royal Free hospital in north London, after spending the night at Glasgow's Queen Elizabeth university hospital.
This was the third time she has been admitted to the Royal Free Hospital, which has a specialist infectious diseases unit.
Medical staff at Glasgow were seen preparing a mobile isolation tent, although the NHS insists that her condition poses no public health risk.
The Royal Free said in a statement: "We can confirm that Pauline Cafferkey is being transferred to the Royal Free hospital due to a late complication from her previous infection by the Ebola virus. She will now be treated by the hospital's infectious diseases team under nationally agreed guidelines.
"The Ebola virus can only be transmitted by direct contact with the blood or bodily fluids of an infected person while they are symptomatic so the risk to the general public remains low and the NHS has well established and practised infection control procedures in place."
In a brief statement earlier on Tuesday, the Greater Glasgow and Clyde NHS Trust said: "Under routine monitoring by the Infectious Diseases Unit Pauline Cafferkey has been admitted to hospital for further investigations."
The Glasgow trust also said that her condition remained stable. Sky News reported that she attended hospital on Monday after "feeling unwell".
This is Cafferkey's third stint in hospital since she returned to the UK in late December 2014. She was thought to have fully recovered in January 2015 at the Royal Free Hospital in London but was then hospitalised again in October.
Patrick Smith is a senior reporter for BuzzFeed News and is based in London.
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