According to the Foreign Office, test results should be available within 24 hours.
However, the Briton’s positive test result did not return until four days later, on Friday August 7, The Mirror reports.
The holidaymaker and his entire party were immediately isolated in their room at the luxury five-star TUI Blue Atlantica Grand Mediterraneo Resort.
They were then removed from the hotel and placed in a special isolation hotel where they are now to stay for 14 days.
TUI confirmed that the vacationer was not showing any symptoms.
The hotel performed “thorough cleaning procedures” following the incident.
TUI has contacted its 140 other guests staying at the hotel and anyone arriving at the hotel for advice.
All passengers on the same plane have also been contacted and could be ordered to self-isolate for 14 days by Greek health authorities.
The FCO warns travelers to Greece that if other passengers on your flight subsequently test positive, “you may be subject to further quarantine / isolation requirements.”
He adds: “These will be mandatory and you will have to comply with the requirements of the Greek authorities. ”
It is understood that the local health authority has assessed the situation and confirmed that there is “no concern” as the risk of the infection spreading is considered “low”.
On its website, TUI describes the BLUE Atlantica Grand Mediterraneo Resort as offering “luxurious looks and a spectacular cliffside setting”.
A TUI spokesperson said: “We can confirm that a guest staying at the TUI Blue Atlantica Grand Mediterraneo Resort in Corfu has tested positive for Covid-19.
“The Greek authorities are carrying out random testing upon arrival at their airports, which has identified the case.
“We are in regular contact with the client who has no symptoms and continues to stay in a designated quarantine hotel.
“As soon as our Corfu team became aware of this case, the client remained isolated in his room until he could be transferred to the specialized isolation unit.
“All affected customers who were able to get in touch with the customer, as well as all new customers due to arrive at the hotel, have been informed.
“No guest or employee has reported illness.
“The hotel has performed extensive cleaning procedures in accordance with government guidance and guests can continue to enjoy their vacation while maintaining the hygienic precautions we have in place.
“The safety and well-being of our customers is our top priority.
“Since the start of the season, TUI and its partners have put in place numerous health and safety measures to provide the best possible protection against infections on planes, transfer buses and hotels.
“We will continue to monitor the situation closely and keep in touch with our guests. ”
All tourists entering Greece are required to complete a Passenger Tracking Form (PLF) at least 24 hours before travel.
If you don’t do this in advance, the airlines may refuse to allow you to travel.
When you arrive in Greece, the Greek authorities will scan your QR code and may ask you to be tested for the coronavirus, as part of the medical screening.
As part of TUI’s Covid coverage, the travel agency will pay for medical tests, flights and extended hotel stays for the British holiday.
The policy covers the cost of overseas holidaymakers’ Covid-19 testing or repatriation if medically necessary and if guests are asked to self-isolate, it will cover the extended stay and a new return flight.