The Duke and Duchess of Sussex have been accused of taking a private photographer to Buckingham Palace for photographs without the permission of the late Queen.

It comes after a behind-the-scenes image was broadcast on Netflix in a trailer for the couple's new documentary, which shows a series of black and white photographs taken at their Frogmore Cottage home, during their 2018 wedding reception and on holidays.

The one-minute-long trailer features an image which appears to have been taken inside Buckingham Palace, showing the couple walking out of the garden entrance.

Protocol dictates that anyone who wants to film or take pictures in the monarch's home require permission.