Former Olympic champion Christine Ohuruogu has announced his retirement at the age of 34.

The Nigerian-born British athlete won 400m gold at the 2008 Olympic Games in Beijing before becoming a world champion in the same event in Osaka a year later.

Christine Ohuruogu also took silver at the 2012 London Olympics and went on to reclaim her 400m title at the world athletics championship in Moscow in 2013.

Ohuruogu while announcing his retirement on Saturday said: “Today is the start of the British Championships and as I won’t be competing I feel it is a good time to announce my retirement.”

“I didn’t feel ready to retire after last season but a combination of my studies and a niggling injury restricted how much training I was able to do this year.” She added.

Speaking further via her Instagram page, she said: “I end my career with four Olympic medals and five World Championships medals.

“Athletics has been my passion for so long and I am proud to call myself an athlete.” Ohuruogu concluded.