A royal expert predicts a “epic clash of brothers” between Prince Harry and Prince William.

As part of his Earthshot Prize celebrations, William plans to hold a ceremony in Boston, Massachusetts, in December.

The rumoured “at home with the Sussexes” docuseries starring Meghan Markle and Prince Harry is reportedly in the works and could air later this year.

An “epic clash of brands and brothers” is expected, according to Daniela Elser, an expert on the subject.

Ms Elser said: “Thus the scene is set for an epic clash of brands, brothers, and approaches to public service, all of which is going to play out on every smartphone and TV screen in the world.

“Talk about bingeable content.

“If ever there will be a moment that signifies how dramatically divergent the paths that the Wales brothers have chosen are, it will surely have to be one man enjoying the spotlight at a Presidential library while the other is being paid to let cameras inside his kitchen.

“William’s awards, an initiative focused on real world efforts to tackle the climate crisis, are set to be held in conjunction with the John F. Kennedy Library Foundation.

“The iconography of this trip writes itself – we will have the 40-year-old future king striding about the place looking nothing short of world leader-like, possibly paling about with a former president or two, and all the while selling the monarchy as a dynamic and proactive institution,” she claimed.