Last February the talk in Ireland was of a political earthquake. The nationalist party Sinn Féin won the most votes in the general election and promised to smash the status quo. Well, so much for that. Ireland’s two old established political parties instead formed a grand coalition and are steering the country through the Covid-19 crisis and Brexit. HARDtalk’s Stephen Sackur speaks to Mary Lou McDonald, the leader of Sinn Féin. Has her party missed its moment?