Kammala jumla mai zuwa: Jackson ya lashe lambar yabo ta farko, azurfa, a cikin mita 110 na shinge, yana da shekaru goma sha tara a Wasannin Commonwealth na 1986. Ba da daɗewa ba ya kafa kansa a fagen duniya, ya sami tagulla a gasar zakarun duniya ta 1987 a Wasannin motsa jiki da kuma lambar azurfa a wasannin Olympics na 1988. Bayan ya sake lashe azurfa a tseren mita 60 a gasar zakarun duniya ta IAAF ta 1989, ya lashe
Lambobin zinare na Turai da na Commonwealth a shekarar 1990. Lokacin 1993 ya gan shi ya kai kololuwar wasansa: bayan azurfa a Gasar Duniya ta Indoor ta 1993, ya ci gaba da kafa tarihin duniya na dakika 12.91 don zama Gwarzon Duniya na 1993. Wannan alamar ba a doke shi ba kusan shekaru goma sha uku kuma ya kasance rikodin gasar zakarun duniya. Jackson ya kuma taimaka wa tawagar 'yan wasan Burtaniya 4 × 100 mita zuwa lambar azurfa ta duniya.