British rapper Dave has thanked his brother in jail, after winning the annual Mercury Prize for the best album released in the UK by a British or Irish act. The winner of the 2019 Hyundai Mercury Prize is @Santandave1's 'Psychodrama' #HyundaiMercuryPrize #MercuryPrize pic.twitter.com/GycAOJ7aoz — Mercury Prize (@MercuryPrize) September 19, 2019 The London talent...