A British man who contracted the new coronavirus while attending a conference in Singapore may have infected seven other people when he stopped off at a chalet in a French mountain village for a few days on his way home, health experts said on Sunday.

The man, Britain's third case of the virus, stayed with a group of holidaymakers for four days in the chalet in Les Contamines-Montjoie late last month.

Five other Britons in the Alpine ski resort have since tested positive for the coronavirus, French officials said this weekend, linking the cases to the chalet group.