 Simson akatanga kukwikwidza mukukanda pfuti achiri kuyaruka paThurrock Harriers muGrays, Essex. Akakunda mudiki pasi pe-15s chikamu pa1984 English Schools Championships, aive ari wepakati pasi pe-17s shasha muna 1986, akabva atora Simon Williams kuzita rezvikoro zveChirungu zvepasi pe-19 muna 1987. Akazvisimbisa semutambi wechidiki wepamusoro wechizvarwa chake, achikunda mazita mana akateedzana kuAAA Junior Championships uye matatu akateedzana AAA Junior Indoor mazita. Akagadza zvinyorwa zvemunyika zvemakore gumi nematanhatu muna 1987 uye vane makore gumi nemanomwe muna 1988. Mumakwikwi epasi rose akaisa wechinomwe pa1987 European Athletics Junior Championships asati avandudza kutora menduru yebronze pa1989 edition. Akanga ari wechishanu mukupfura mu1988 World Junior Championships muAthletics. 