By Simon Jessop LONDON (Reuters) – Britain’s biggest listed companies are routinely under-reporting workplace injuries and fatalities to investors, a report by corporate governance advisory firm PIRC said on Thursday. PIRC, which advises investors with a combined 1.5 trillion pounds ($1.9 trillion) in assets, said it had uncovered “worrying gaps” after checking annual reports from companies in the FTSE 350 against Health and Safety Executive (HSE) data. As well as failing to report safety violations to investors, the analysis also pointed to a lack of consistency in the metrics used to assess …