Lush was selected to compete for Great Britain at the 2012 Summer Olympics in the newly created Elliott 6 metres match-racing event. She competed alongside sisters Lucy and Kate MacGregor. Together the three are nicknamed the "Match Race Girls". The event took place at the Weymouth and Portland National Sailing Academy with the round robin group stage being held from 29 July to 4 August 2012. The team finished 7th in the competition.