A third British national has been diagnosed with suspected hantavirus linked to a cruise ship outbreak, health officials have said. The UK Health Security Agency (UKHSA) had already confirmed two cases among British nationals, who are in hospitals in the Netherlands and South Africa. It said a third has been reported on the south Atlantic island of Tristan da Cunha, where the patient remains. The outbreak linked to the cruise ship MV Hondius has killed three people and the World Health Organization has warned more hantavirus cases could emerge, though officials said they expected the outbreak to be limited if precautions were taken. The fate of the Hondius has prompted international alarm and a scramble to trace the outbreak of the potentially deadly human-to-human strain. The UKHSA said none of the British citizens still onboard the ship, which is now travelling to Tenerife, were reporting symptoms. But they are being closely monitored.…