Stock Photo - The Duke and Duchess of Cambridge and Prince Harry join a training day with the runners taking part in the 2017 Virgin Money London Marathon for Heads Together, the official Charity of the Year. The training day for Team Heads Together, the campaign to change the conversation on mental health which is spearheaded by Their Royal Highnesses, at the Queen Elizabeth Olympic Park (QEOP) in London. Approximately 150 runners will take place in the training day, which will include a run around QEOP and a training session on the London Marathon Community Track, beside the former Olympic Stadium. The day will also include informative presentations and question and answer sessions in the Copper Box Arena, on training and preparing for a marathon from specialists in areas such as nutrition, running and stretching.  Featuring: Catherine, Duchess of Cambridge, Kate Middleton, Prince William, Duke of Cambridge, Prince Harry Where: London, United Kingdom When: 05 Feb 2017 Credit: David Sims/WENN.com