DUBLIN (Reuters) - Ireland is to drop a ban on travellers from Britain and South Africa from Saturday and will instead require them on arrival to provide a negative COVID-19 test from the previous 72 hours, Transport Minister Eamon Ryan said on Wednesday. The measure will remain in place at least until the end of January and the government will consider whether to impose the same measure on other countries with high levels of COVID-19 infection, Ryan told a news conference.