Ofcom is to investigate whether GB News breached broadcasting rules with a second showing of its interview with Donald Trump after complaints that the US president’s claims about climate change, Islam and immigration had gone unchallenged. A series of complaints were made over the interview, which the presenter Bev Turner conducted last November. The media regulator had previously announced that it would not open an investigation into the original broadcast of the interview on the rightwing network’s US-based programme Late Show Live. In what is emerging as a test case in its approach to impartiality, however, it has now announced that it will investigate a November edition of The Weekend, a GB News show that repeated the interview in full the next day. Trump was not challenged as he claimed human-induced climate change was a hoax and that London had no-go areas for police. He said parts of the capital had sharia law.…