It’s a Saturday night in the heart of the Cathedral Quarter and Steve Mason is in good form. Recent interviews in support of his new album reveal a musician re-invigorated by the simple creativity of human interaction. Inside a buzzing, sold-out Black Box he is throwing catalogue shapes for photographers and sardonically re-naming songs. ‘A lot of Love’ is introduced as a love song from Chris Martin to Gwyneth (it’s too good for that), and the soulful tambourine-driven ‘Seen It All Before’ is re-christened “Slide On Fat Jesus.” He looks sweltered on stage in a full anorak but tries to…