 Ramba uchiverenga ndima iyi - Pamakwikwi eOlympics a2012, Heffernan akapedza ari wechipfumbamwe mumakwikwi e20kmrudzi. Vhiki rakatevera akapedza ari wechina munhangemutange yemakiromita 50, achipedza maminitsi manomwe nokukurumidza kupfuura rekodhi yenyika yapfuura. Kubudirira kwake muLondon kwaive kuita kwepamusoro kwechikwata cheIrish Athletics kumaOlympics a2012. 