Mezue ahịrịokwu na-esonụ: Ihe nrite mbụ Walker nwetara n'asọmpi mba ụwa bụ ọla nchara n'ọsọ 100 m breaststroke na 1997 European Championships na Spain. Kemgbe ahụ, ọ gara n'ihu merie ihe nrite anọ ọzọ nke European Championship na ihe nrite asatọ nke World Championship. O nwetakwara ọla nchara n'ọsọ mita 50 n'egwuregwu onwe ya ma bụrụ onye nke anọ n'ọsọ mita 100 n'egwuregwu onwe ya, n'asọmpi mbaụwa nke afọ a.
2006 Commonwealth Games na Melbourne, ebe ọ bụ naanị onye nwere nkwarụ na-egwu mmiri na-anọchite anya England.