Kammala jumla mai zuwa: An kira Chambers a cikin tawagar 'yan wasan Birtaniya don wasannin Olympics na London na 2012 bayan da' yan wasan suka yi la'akari da gwajin da ya yi da kuma lokutansa daga shekarar da ta gabata. Ganin sauyin da ya faru a cikin sa'arsa, ya ce: "A gare ni wakiltar ƙasata a gasar Olympics gata ce da bai kamata a ɗauka da sauƙi ba. Samun zarafin yin hakan a garinmu mafarki ne da a wasu lokatai yake da nisa sosai kuma yanzu ya zama gaskiya". Ya dawo cikin tawagar 'yan wasan Burtaniya a gasar zakarun Turai ta 2012 bayan rashin shekaru shida amma canjin baton da aka yi ya sa aka cire tawagar. A wasannin Olympics ya lashe tseren mita 100 a cikin mafi kyawun lokacin 10.02 seconds, tare da ƙa'idar ƙa'idar 2.0 m / s bayan iska, a tserensa na farko na Olympics a cikin shekaru goma sha biyu. An zana shi a cikin wasan kusa da na kusa da Usain Bolt amma gudu na 10.05 na Chambers na hudu ya sa bai shiga wasan karshe ba. Wasannin Olympics sun ƙare a cikin
4 × 100 mita relay zafi kamar yadda Birtaniya tawagar sanya wani ba bisa doka ba baton musayar.