Like a neutrino bomb on the landscape of banking, regulation and journalism, the HSBC tax evasion story via its Swiss subsidiary keeps spreading with devastating effect – at least for those whose careers concern it. According to investigative journalist Nafeez Ahmed, who managed to get hold of rather golden whistleblower material from Nicholas Wilson, a “conspiracy of silence” has characterised the treatment of HSBC within the regulatory community, law-enforcement authorities and the media generally.