England rugby fans could soon be banned from singing Swing Low, Sweet Chariot at matches because of the song's ties with slavery, it has emerged. The iconic anthem which rings round the stands at Twickenham is being reviewed by the Rugby Football Union, which has launched a wide-ranging probe into racism. Written by a black slave in the American South during the nineteenth century, the song was first belted out by supporters when two black wingers - Martin Offiah and Chris Oti - became sporting heroes on the pitch at the end of the 1980s.