It defies logic how Belfast’s Cathedral Quarter Arts Festival consistently deliver on world-class, exceptionally diverse programmes, year after year after year. And yet, it’s something that the festival has managed, once again, for this year. Returning to the city across May 2-12, it will welcome everyone from Teenage Fanclub, Anna Calvi and Spiritualized to Jason Lytle, Lisa O’Neill and Echo & The Bunnymen. And that’s only scratching the surface (go here to delve deep into this year’s line-up, which, as ever, spans music, words & ideas, theatre, comedy, sound & vision, visual arts, and various special events.) It gives us no…