Cashmore led home a British clean sweep in her 100m individual medley. Setting a time of one minute 11.83 seconds, the City of Leeds swimmer beat Stephanie Millward and Kate Grey into second and third. In the final race of the championships, Cashmore joined Stephanie Millward, Elizabeth Simpkin and Eleanor Simmonds in the 34-point 4x100m relay squad to win gold in a new world record of four minutes 56.23 seconds, ahead of Russia and France.

Earlier in the week, Cashmore had won silver medals in 100m Breaststroke SB8 and 200m Individual Medley SM9. The second-year Linguistics student set a new personal best in 100m Breaststroke SB8, to finish behind Russian, Olesya Vladykina. In the 200m Individual Medley SM9, she took silver after being narrowly beaten by teammate Stephanie Millward.

Claire's success in the 100m Breaststroke on 3rd of December 2009 coincided with celebrations to mark the 1,000 day countdown to the opening ceremony of the London 2012 Paralympics, when Claire will be aiming to qualify for her third Games having represented Great Britain in Athens 2004 and Beijing 2008.