Born in London of St Lucian parents in 1969, Denys took his first lessons in music at the age of 13. At the age of 14 he began to play tenor sax. His introduction to jazz came from videos of Morrisey-Mullen and from listening to recordings by Charles Mingus and Count Basie.
He studied music for two years at the West London Institue and then went on to take part in a jazz course at London’s Guildhall School of Music. He joined Gary Crosby’s Nu Troop as the tenor saxophonist after attending an open jam session organized by Tomorrow’s Warriors. In 1993 Denys joined the Jazz Warriors.