Her most notable achievements to date are winning four consecutive gold medals at the British Synchronized Swimming Championships from 2004 to 2007. She has competed at numerous European and World Championships and at the 2008 Beijing Olympics where she finished in 14th position in the duet event. Following the recent 2011 World Championships in Shanghai, in which she participated with Jenna Randall who has been her partner since before the 2006 Commonwealth Games, she is currently ranked 8th in the duet. Olivia won the silver medal in the duet competition at the 2010 Delhi Commonwealth Games and represented Team GB at the London 2012 Olympic Games in the duet and team events.
- "Olivia Allison". swimming.org. British Swimming & The ASA. Retrieved 14 December 2011.
- "Olympics fitness file: Olivia Allison". The Guardian. 10 January 2009. Retrieved 14 December 2011.
- "RANDALL AND ALLISON CELEBRATE WORLD IMPROVEMENT". swimming.org. British Swimming & The ASA. 22 July 2011. Retrieved 14 December 2011.
- Nash, Matthew (12 December 2011). "Olivia Allison: How smiling can net you synchronised swimming Olympic gold". Metro. Retrieved 14 December 2011.
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