The leader of Sinn Fein has expressed regret at the IRA murder of Prince Philip’s uncle, Lord Mountbatten, following the Duke of Edinburgh’s funeral this weekend. Mountbatten was assassinated in 1979 while holidaying in Mullaghmore, County Sligo, Ireland, by a bomb that also killed his teenage grandson and a young boat crewman. Mary Lou McDonald, the leader of the party that was once the...