Whakaotihia te rerenga e whai ake nei: I te 2012 Summer Olympics i Rānana, i whakataetae a Halsall i nga kaupapa e rima. I tae atu a Halsall ki ngā whiringa toa o
100m butterfly, posting a time of 58.52, well off her season's best of 57.56 set in March. Ko te 100m butterfly, posting a time of 58.52, well off her season's best of 57.56 set in March. Ko te 100m butterfly, posting a time of 58.52, well off her season's best of 57.56 set in March. I eke a Halsall ki te whiringa toa o te 100m freestyle me te 50m freestyle, ka mutu te 6 me te 5 o nga wa. I roto i te 4 × 100 m freestyle relay Halsall i kaukau i te waewae tuarua i roto i te wehenga o te 53.29, ka awhina i te roopu o Ingarangi ki te whakaoti i te 5 o nga waahi. I te whakamutunga o te 4 × 100 m medley relay i mutu te kapa o Ingarangi i te 8th, me Halsall e whakarato ana i te waewae pungawerewere o 54.08.