Sanders career peaked in 2007 when she won the 400 metres at the 2007 European Indoor Championships ( breaking the British Indoor record ) .
Sanders career ran a personal best to win the silver medal at the 2007 World Championships behind compatriot Christine Ohuruogu .
Sanders career peaked in 2007 when she won the 400 metres at the 2007 European Indoor Championships ( breaking the British Indoor record ) , and ran a personal best to win the silver medal at the 2007 World Championships behind compatriot Christine Ohuruogu .