Prince Harry will have his HRH title removed from notices at the new royal fashion exhibition, which features his mum Princess Diana's wedding dress.The exhibition launched earlier this week, and features a sign which says Diana's iconic gown was "lent by HRH the Duke of Cambridge and HRH the Duke of Sussex." However, 36 year old Harry and pregnant wife Meghan Markle, 39, permanently stepped down as senior members of the Royal family earlier this year, meaning he is no longer able to use his HRH