Britain's confirmed cases of the South Africa coronavirus variant have hit at least 147, but "homegrown" strains are the "biggest worry", according to experts.
Danny Altmann, professor of immunology at Imperial College London, said the UK must remain on guard, with track and tracing vital to keeping a lid on any new strains.
But he admitted "there is an end in sight" because there's not an unlimited amount of mutations from the current spike antigen which continues to spread through the country.
Health minister Edward Argar gave the figure during an interview with the BBC, but said it "may be a day or so out". He added: "So it's still very much not the dominant strain here, the dominant strain here is very much the historic one, the one