<prompt> Pedzisa mutsara unotevera: Pamitambo yeOlympic yeZhizha ya2012 muLondon, Halsall akakwikwidza mumitambo mishanu. Halsall akasvika kuma semi-finals e100m butterfly, achinyora nguva ye58.52, kure nemwaka wake wakanakisisa we57.56 wakaiswa muna March. Halsall akapinda mumakwikwi ekupedzisira emamita 100 akasununguka uye  <response>: 50m freestyle, vachipedza vari 6th uye 5th zvichiteerana. Mu 4 × 100 m freestyle relay Halsall akahwina muchikamu chechipiri muchikamu che53.29, achibatsira chikwata cheBritish kusvika kunzvimbo yechishanu. Mumakwikwi ekupedzisira e4 × 100 m medley relay chikwata cheBritain chakapedza chechisere, naHalsall achipa gumbo reanchor re54.08. 