Who knows where the time goes? For Fairport Convention, celebrating its fiftieth anniversary in 2017, and for its legion of fans, Sandy Denny’s song and lyric from Fairport Convention’s 1969 album Unhalfbricking has never been more poignant, or indeed, more haunting. Where indeed? Fairport has played just about every town, city and village the length of breadth of mainland UK since its first concert in 1967, but jaunts to this part of the world have been fairly rare, with this being Fairport’s first Belfast gig since 2010. All the more reason then for celebration. Fittingly, this afternoon’s matinee gig and…