Dee ihe na-esote paragraf a - Ihe nrite mbụ Walker nwetara n'asọmpi mba ụwa bụ ọla nchara n'ọsọ 100m 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 na 50 m freestyle ma mechie nke anọ na 100 m freestyle, na 2006 Commonwealth Games
na Melbourne, ebe ọ bụ naanị onye nwere nkwarụ na-egwu mmiri na-anọchite anya England.