Prince William has a “special responsibility” towards the late Queen’s “most significant legacy.” A royal commentator has said that, in his position as heir to the throne, the Prince of Wales has a responsibility to attend public engagements amidst media criticism about Kate’s photo blunder. Prince William’s attendance at the Commonwealth Day Service earlier this week was “essential” because the King did not attend as he continues cancer treatment. The Princess of Wales has taken the blame for editing a photo that the couple posted on their Instagram for Mother’s Day. The picture was removed f…