Article continues below advertisementPrince Harry's potential return to Britain this summer is said to be triggering fresh tensions within the royal family, with Kate Middleton and Prince William said to be prepared to "go into hiding" if the Sussexes bring what insiders describe as their "circus to town."'As OK! has revealed, Harry, 41, and Meghan Markle, 44, are understood to be considering a U.K. visit with their children, Archie, 6, and Lilibet, 4, potentially centered around an invitation to Sandringham from King Charles, 77.