Whakaotihia te rerenga e whai ake nei: I tino whakapai ake a Courtney ki ona 800 m me 1500 m pai rawa atu i te 2013 ka wikitoria i te kaupapa whakamutunga i te BUCS Championships i roto i te whare me waho i taua tau. I te tau 2014 i roto i te whare, i wikitoria ia i te taitara o roto o Wales me te tuatoru i te 2014 British Indoor Athletics Championships. I te tau 2015 i kite ia i tana 800 m me tana 1500 m pai rawa atu ki te 2:05.48 me te 4:09.74 meneti ana ka tiimata tana whakataetae a-ao i te
2015 European Athletics U23 Championships, whakanohoia te tekau i te 1500 m. Ahakoa ko ia te tuawhitu o te motu i te 2016 British Athletics Championships, i oma ia i te 4:07.55 meneti me te whiriwhiri mo te 2016 European Athletics Championships, i whakataetae i te rauna tuatahi anake. I mahi tahi ia me Cameron Boyek, Sarah McDonald, me Tom Marshall ki te tango i te mētara koura i te huihuinga relay whakauru i te 2017 European Cross Country Championships.