Kammala wannan jumla: A watan Maris na 2007, Duggan mai shekaru 15 ya fito daga benci mai maye gurbin don zira kwallaye a wasan farko na Ingila a karkashin 17. Tun daga wannan lokacin ta wakilci Ingila a matakin Under-19, Under-20 da Under-23. Ta taka leda a gasar cin kofin duniya ta mata na FIFA U-20 a duka 2008 da kuma
Shekarar 2010. A ranar haihuwar Duggan ta 18th, ta zira kwallaye biyu a wasan karshe na gasar zakarun Turai na mata na shekara ta 2009 a Ingila, a kan Sweden a Belarus.