Scientists have identified another new variant of coronavirus in the UK with some potentially troubling mutations. B.1.525 appears similar to the South African variant which prompted door-to-door tests in areas where it has been found. Researchers from Edinburgh University have found 38 cases so far – 2 in Wales and 36 in England – in samples dating back to December. It has been seen in other countries, including Denmark, Nigeria and the US. UK experts are studying it to understand what risk it poses. It is too soon to say if it should be added to the UK’s list of “variants of concern” and whether mass testing for it should happen. So, for now, it is a “variant under investigation”.