 Ramba uchiverenga ndima iyi - Aive nhengo yeWolverhampton Bilston Athletics Club, achikwikwidza mumitambo yemapfumo uye yemitambo yakawanda. Muna 1972, aine makore 16, Sanderson akakunda mujavelin yeIntermediate paEnglish Schools Athletics Championships. Gore rakatevera racho akasarudzwa kukwikwidza mumutambo wokukanda pfumo paEuropean Athletics Junior Championships ya1973, kwaakasvika mumakwikwi ekupedzisira asi akapedza ari wechi12 aine, kure shure kwemukundi, Tonya Khristova, uyo akakanda. Mushure memakwikwi aya, Sanderson akasarudza kuisa pfungwa dzake pamakwikwi epfumo panzvimbo pe pentathlon, chikamu nokuti aitarisira kukwikwidza mupfumo kuti ape mikana yakawanda yekufamba. Akaita kutanga kwake kwepasi rose mumutambo wekukanda pfumo mu1974 British Commonwealth Games, achipedza wechishanu. Gare gare gore iroro, akapedza wechi13 pa1974 European Athletics Championships. Sanderson akatyora UK javelin achikanda junior rekodhi kashanu, kubudirira muna 1974. Akava muridzi werekodhi yenyika muna 1976, achikanda. Akaenderera mberi nekuwana gumi nyowani UK Senior zvinyorwa uye mashanu Commonwealth zvinyorwa. 