Lewis Capaldi: 'Paige Turley has every right to talk about me, I've written songs about her and made money from them'

The Scottish singer-songwriter has hit a billion streams for 'Someone You Loved' and reached No 1 in the UK and America. He talks to Roisin O'Connor about humour, heartbreak, his ex-girlfriend winning 'Love Island', and having a panic attack at the Grammys