Britain's Prince Harry started the last round of his royal duties on an informal note on Wednesday, making it clear the audience listening to his speech on sustainable travel in Edinburgh should simply call him Harry.

Queen Elizabeth's grandson and his American wife Meghan, the Duke and Duchess of Sussex, have announced they will step down from their duties as senior royals next month to spend more time in North America.

Although Harry will no longer be known as His Royal Highness, he will still be a Prince.