She is a member of the London Rowing Club in Putney. A fixture in British lightweight sculling since 2007, Hosking won a surprise gold medal for Great Britain in the 2012 Olympics lightweight double sculls, along with Kat Copeland. Hosking and Copeland's success was the second of six gold medals won by Great Britain on the middle Saturday of the 2012 Games, on what became known in the United Kingdom as Super Saturday.