The royal couple gives a detailed account in the lawsuit of the media harassment they say they've had to constantly fight in the months since they moved to Southern California.

In their last message before stepping down, Harry and Meghan said they would focus on their family for the next few months while developing a new future non-profit organization, having been forced to give up their previous SussexRoyal brand.

Last month, Canada said it would no longer provide security once the couple were no longer working members of the British royal family.

Harry and Meghan may have chosen Canada, a Commonwealth country, to somewhat mollify the Queen, Matthew Fisher writes.

According to the statement, the Sussexes will not use their royal titles as they are no longer working members of the Royal Family, and will repay money used to refurbish Frogmore Cottage, which will remain their family home in the U.K.

The Cambridges appear to be done adding to their family, at least according to Middleton.

"Its hard to turn down money when you are starting a new business, but this one was an easy choice to turn down."

The Queen "would have preferred them to remain full-time working members of the Royal Family," the statement reads.

Royal officials said the queen had summoned her grandson Harry, his elder brother, Prince William, and their father, Prince Charles, to the rural retreat 160 kilometres north of London, for a meeting on Monday.

The meeting on Monday will be the first time the senior royals have met in person to discuss the concerns raised by Harry and Meghan.