Mandatory Credit: Photo by Arthur Edwards/REX Shutterstock (5226336ac) Prince William and Catherine Duchess of Cambridge Royal visit to Harrow College, London, Britain - 10 Oct 2015 The Duke and Duchess of Cambridge marked World Mental Health Day at an event hosted by Mind at London's Harrow College The Duke and Duchess met young people who have battled their own mental health problems and now volunteer with the anti-stigma campaign Time to Change or Mind in Harrow, to raise awareness about mental health with other young people. Their Royal Highnesses observed a Mindkit training session at the college's Enterprise Centre and attended a reception to celebrate World Mental Health Day