Kammala wannan jumla: An bar Harrison daga tawagar 'yan wasan GB don
Gasar Zakarun Duniya ta 2012 da Wasannin Olympics na 2012 bayan da wasu ƙwararrun mahaya suka dawo cikin ƙungiyar. Ya lashe taken 'yan kasa da shekaru 23 a Gasar Gasar Gasar Lokaci ta Burtaniya. 2013 ya ga Harrison ya koma tawagar Burtaniya don Gasar Cin Kofin Duniya, inda ya kasance wani ɓangare na ƙungiyar Team Pursuit da ta lashe lambar azurfa. Harrison ya sanya hannu a kan tawagar don kakar 2014.