I was puzzled at now spotting this story in the UK media and on looking there are a number of reports. First this has become public as thee is a coroners inquest underway and second the actual death was in March 2015 - 3.5yrs ago (the operation was in February 2015). That is a long time to wait for an inquest (not that far more political and contentious matters can wait a very long time for an inquest).

The inquest's final BBC report:https://www.bbc.co.uk/news/uk-england-tyne-46143940

This linked article has a video advert for the robot:https://www.dailymail.co.uk/news/article-6363243/Pioneering-robot-KNOCKED-medics-hand-middle-heart-operation.html