By Guy Taylor HS2 has launched a formal investigation into allegations of gross misconduct tied to a “serious” data breach earlier in the year, City A.M. understands. Sources allege the incident took place in late May. HS2 Ltd, the company sponsored by the Department for Transport (DfT) to oversee the project, subsequently began an investigation into a potential significant breach of GDPR and Cyber Security policy via its counter fraud and business ethics team. Preliminary findings have led to an internal formal disciplinary investigation into what could amount to “gross misconduct,” according…