Mia Turrent, 14, from Richmond, London, is preparing to take on the Saucony London 10k this Sunday, 14 July, to raise vital funds for Momentum Children's Charity. Momentum supported Mia's family when one of her younger sisters, Ximena, was diagnosed with cancer two years ago. Mia is reaching the final stages of her training which has seen her take on lengthy runs in Richmond Park and along the towpath of the River Thames.