Two people who were on board the cruise ship linked to the hantavirus outbreak are self-isolating after returning to the UK, health officials have said.
The UK Health Security Agency (UKHSA) said that neither of these people who were on board the MV Hondius are reporting symptoms and that a number of close contacts of those on the boat are also being "offered support and are also self-isolating".
The health authority said that it is also helping to trace people who may have been on the same flight as a confirmed case.
It said that it is working to prepare for the arrival of British nationals to the UK from the Dutch-flagged ship.
Health officials said once the ship docks in Tenerife the remaining British nationals can be repatriated if they do not develop symptoms.
"None of the British citizens on board are currently reporting symptoms but they are being closely monitored," the UKHSA said in a statement.
Meanwhile it is working with the Foreign Office and Border Force to "trace further individuals who may have been on the same flight as a confirmed case, in order to carry out public health risk assessments and ensure appropriate precautionary measures are in place".
The UKHSA said it is in contact with medical teams providing care for Britons abroad.
We are standing up arrangements to support, isolate and monitor British nationals from the ship on their return to the UK and we are contact tracing anyone who may have been in contact with the ship or the hantavirus cases to limit the risk of onward transmission
Dr Meera Chand, UKHSA
It stressed that the risk to the general public "remains very low".
Dr Meera Chand, deputy director for epidemic and emerging infections at UKHSA, said: "Our thoughts are with all those affected by the hantavirus outbreak onboard the MV Hondius.
"It's important to reassure people that the risk to the general public remains very low.
"We are standing up arrangements to support, isolate and monitor British nationals from the ship on their return to the UK and we are contact tracing anyone who may have been in contact with the ship or the hantavirus cases to limit the risk of onward transmission.
"UKHSA will continue to work closely with government partners to offer all necessary support."
The outbreak has been linked to a birdwatching expedition in Argentina which two of the passengers went on before boarding the ship.
Some 19 British nationals were listed as passengers on the cruise, which was sailing from Argentina to Cape Verde, with four British crew members.
Two Britons, a passenger and a crew member, are among those taken ill in the suspected outbreak, which has been linked to three deaths.
The crew member, understood to be a doctor on the ship, along with a Dutch crew member and another passenger were taken from the ship on Wednesday for onward travel to the Netherlands, the World Health Organisation (WHO) said.
Spanish health officials said the British medic is now in a more "stable condition" after previously being in a "critical condition".
The Associated Press reported that a medical evacuation flight arrived at Amsterdam's airport on Wednesday evening.
The passenger was medically evacuated from the ship on April 27 and taken to Johannesburg, South Africa.
Foreign Secretary Yvette Cooper said the Foreign Office is "working urgently" to help get Britons "safely home with proper protection for public health".
Health Secretary Wes Streeting added: "The outbreak of hantavirus on the MV Hondius will be worrying many.
"The Government are taking this incredibly seriously and are working urgently to support the British nationals involved.
"We are working across DHSC, UKHSA and the FCDO to ensure all those affected get home safely."
The evacuation means the ship can now continue on its three-day journey to the Canary Islands after Spanish authorities gave permission for the boat to dock.
But a row erupted after the president of the Canary Islands expressed concern over the ship docking in Tenerife.
In an update posted online, Spanish health authorities said that the ship is expected to arrive within 72 to 96 hours.
The European Centre for Disease Prevention and Control (ECDC) said that everyone on board should be considered as a "close contact".
A Threat Assessment Brief posed by the European health agency states: "We consider everyone on the ship to be close contacts, due to the closed setting and shared social areas and activities, aligned with the precautionary principle."
The Associated Press reported the Argentine government's hypothesis is that a Dutch couple contracted the virus during a birdwatching outing in the city of Ushuaia before boarding.
Two Argentine officials told the news agency that the couple visited a landfill during the birdwatching tour where they may have been exposed to rodents carrying the infection.
The ship has been anchored off Cape Verde. Passengers are confined to their cabins while "disinfection and other public health measures are carried out", the WHO said on Tuesday.
It is understood that none of the remaining passengers on board have symptoms and two extra medics have been flown in to assist.
The WHO said there are eight cases, three of which are confirmed.