Meghan Markle’s UK return poses Palace control ‘nightmare,’ expert warns

Meghan Markle is returning to Britain with more independence than she had as a working royal, an arrangement experts say could test Buckingham Palace's boundaries.

Markle, 45, and Prince Harry, 41, recently relocated to the United Kingdom with their children Prince Archie, 7, and Princess Lilibet, 5, for an extended stay though they will remain private, non-working members of the royal family.

While the couple is expected to establish a private residence outside London and keep their home in Montecito...