Sampha review – a polite, pulsing performance cuts to the core

Electric Brixton, LondonSelling out venues even before his debut album is out, the British songwriter’s distinctive vocals are a brand of their ownSampha’s always been about the voice. Diehard fans may have been following the 27-year-old producer and musician’s work since his 2010 Sundanza EP, but most listeners will know him more for the husky vocals slathered like a soothing paste on to other people’s singles. Whether adding depth to Jessie Ware’s 2013 single Vale