Kammala jumla mai zuwa: Downie ya wakilci Burtaniya a gasar tseren ruwa ta duniya ta 1973 a Belgrade, Yugoslavia inda ya karya tarihin Scotland na mita 200 na 'yanci. A shekara mai zuwa ya wakilci Scotland a 1974 British Commonwealth Games a Christchurch, New Zealand. A shekarar 1975 ya yi iyo a Scotland a gasar kasashe 8 a Prague, Czechoslovakia. kuma ya lashe lambar azurfa a Gasar Cin Kofin Duniya ta 1975 a Cali, Colombia a matsayin wani ɓangare na relay na 4x200-mita mai kyauta na Burtaniya tare da Alan McClatchey, Gary Jameson, da Brian Brinkley. A wannan gasar ya lashe lambar tagulla a matsayin wani ɓangare na relay na 4x100-mita na Burtaniya tare da David Wilkie, James Carter da Brian Brinkley. Baya ga lashe lambar tagulla, ya kasance na shida a tseren mita 200 a gasar Olympics ta Montreal a 1976 lokacin da ya kafa tarihin Burtaniya wanda ya tsaya na shekaru shida. Ya yi iyo a cikin
1977 Gasar Wasannin Ruwa ta Turai a Jönköping, Sweden, kuma ta wakilci Scotland a Wasannin Commonwealth na 1978 a Edmonton, Alberta, Kanada. Downie ya riƙe duka Scotland 200-mita da kuma 400-mita freestyle records na shekaru 10 daga 1972 zuwa 1982.