Ramba uchinyora ndima iyi - Moorcroft akaita mutambo wake wokutanga wevakuru veGreat Britain muna 1973 uye akakwikwidza mumitambo yake yokutanga yeOlympic muMontreal muna 1976, achiva wechinomwe mumakwikwi okupedzisira emamita 1 500. Akakunda menduru yegoridhe mumitambo yeCommonwealth muna 1978 muEdmonton pamamita 1 500. Mavhiki mana chete gare gare, akahwina menduru yebronze pamugwagwa mumwe chetewo muEuropean Athletics Championships muPrague
. Mumakwikwi eOlympic eMoscow muna 1980, akatambura nezvinetso zvomudumbu uye akabviswa mumakwikwi e5 000-metre semifinals.