Dee ihe na-aga n'ihu maka paragraf a - Hardcastle lara ezumike nká na asọmpi igwu mmiri na 1986 mgbe ọ dị afọ 17; n'ajụjụ ọnụ nke 2012 o kwuru na mgbe ọtụtụ afọ nke ọzụzụ ọ chọrọ inwe ndụ ntorobịa nkịtị. Mgbe ọ rụsịrị ọrụ dị ka odeakwụkwọ na Ford, o kpebiri ịlaghachi n'egwuregwu ahụ na 1992 wee maliteghachi asọmpi na 1993. Hardcastle bụ onye otu ndị otu relay ndị meriri ọla nchara na 4 × 200 mita freestyle na 1993 European Championships
na ọlaọcha na 1994 Commonwealth Games, ebe o meriri ọla nchara n'otu n'otu na 400 mita freestyle. N'afọ 1995, o nwetara ihe nrite ọla edo na 800m freestyle na ọla nchara na 400m freestyle na World Short Course Championship. N'egwuregwu Olympic nke 1996 n'Atlanta, ọ ruru na ngwụcha nke 800-mita freestyle, na-emecha nke asatọ.