Seal first hit the British pop charts as the voice on Adamski’s 1990 number one hit, ‘Killer’, but went on to break out of the ‘guest vocalist’ ghetto to reach international pop success with the singles ‘Crazy’ and ‘Future Love Paradise’ and an eponymous album. His success in the mainstream market marks a breakthrough for black artists who, as the final part of Radio 1’s documentary on Saturday, ‘Crossover: the Story of British Black Music’ shows, are moving from the pigeonholing of the past to reach massive, racially mixed audiences.