St John performance improvements - May 2014 Robyn Bern | Wednesday 25 June 2014 The incidents are: immediately life threatening ("purple" ), immediately life threatening or time critical ("red" ), and to urgent / potentially serious but not immediately life threatening incidents ("orange"). This year to date (YTD) report highlights the improvements made over the last 12 months, in each district St John operates the ambulance service in. Click here to see the details.