Meghan Markle and Prince Harry's Australian visit could reportedly open the door for their U.K. return. As the couple prepares for their unofficial trip Down Under, a source claimed their security plan could map out how they could safely travel to the Duke of Sussex's homeland. "It is a significant joint tour and could prove to be a blueprint for future tours together of this type," an insider told The Sun. Prince Harry and Meghan Markle visit the Taronga Zoo in Australia in 2018. By: Ian Vogler/MEGA The appearance marks the couple's first time back since their successful royal tour in 2018.