A University of Witwatersrand professor in Johannesburg says the UK’s new visa scheme for top global graduates, which does not include those from African universities, is “de facto” exclusionary and is “retrograde” and “self-limiting”. Prof Lynn Morris, the deputy vice-chancellor of research and innovation at the university told the BBC’s Newsday programme that the university rankings are “imperfect”. Thirty-seven universities have made the list – most are in the US, but there are also some in Europe and Asia, and none are in Africa.