By Sophie Huskisson There will be a referendum on uniting Ireland within the next 10 years, the new First Minister of Stormont has said. Michelle O’Neill, in her first UK interview as First Minister, said she believes there will be a vote on uniting the Republic of Ireland and Northern Ireland in the next decade. The appointment of the Sinn Fein vice president on Saturday provided a moment of history on the day the powersharing institutions returned after a two-year hiatus. Asked whether she anticipated a referendum on Irish unity within 10 years, Stormont’s first nationalist First Minister Ms…