William and Kate have dedicated much of the past year trying to break down the stigma of mental health, and spent the final day of their Canada tour visiting charities that specialise in the field.
Now The Mail on Sunday can reveal the Duke and Duchess of Cambridge, and Prince Harry, are to stage a special BBC documentary to talk about their new charity initiative.
Next year will mark the 20th anniversary of Princess Diana’s death, and the trio’s charity work is seen as a continuation of her humanitarian legacy.
