Duke and Duchess of Sussex
Meghan Markle and Prince Harry, founders of Archewell Foundation. Instagram/Sussex Royal

While the Royal Family gathered for their traditional morning service at Sandringham this week, one notable absence once again dominated the headlines.

For Prince Harry and Meghan Markle, the festive season has become a sun-soaked Californian affair, miles away from the chilly Norfolk landscape of Harry's youth.

But according to one former royal insider, the distance between the Sussexes and the House of Windsor is no longer just geographical; it is a matter of profound and perhaps irreparable broken trust.

The Duke and Duchess of Sussex are currently celebrating their seventh consecutive holiday season away from the royal fold, enjoying the warmth of their Montecito estate with Prince Archie, six, and Princess Lilibet, four.

While their current festivities—complete with candlelit evenings and family games—paint a picture of domestic bliss, they represent a stark departure from the rigid, centuries-old customs of the British monarchy.

Why Trust Is The Final Barrier To A Royal Reunion

The possibility of a reconciliation has long been a subject of public debate, yet Paul Burrell, the former butler and confidant to the late Diana, Princess of Wales, believes the door to Sandringham is firmly bolted.

Speaking on behalf of Casino.org, Burrell argued that the couple's penchant for revealing the inner workings of the monarchy has made them persona non grata during the family's most private moments.

'That will never happen. I've always said it, and I'll say it again, it will never happen,' Burrell declared when asked if an invitation would ever be extended. He suggested that the reason is rooted in the unique environment of a royal Christmas.

You have to consider the dynamics of everyone living under one roof. If you were to inject Harry and Meghan into that mix, into that very particular 'soup' of royalty, it would become a complete disaster.

Burrell's assessment is blunt: the Sussexes are viewed as a security risk to the family's privacy. 'They simply cannot be trusted to keep what happens at Sandringham a secret,' he claimed, noting that the holiday is the one time of year the royals can truly relax behind closed doors.

For a family that has seen its private conversations and tensions laid bare in best-selling memoirs and global docuseries, the prospect of welcoming the couple back into the 'inner sanctum' is, in Burrell's view, an impossibility.

From Royal Protocols To Pyjamas And Take-Out

While the royals in the UK followed their 'military operation' of a schedule—including formal dinners and the traditional walk to church—Meghan offered a glimpse into a much more relaxed reality in her As Ever newsletter.

Writing to her subscribers, the Duchess described a scene that is a world away from the formalities of Norfolk.

'I plan to spend today cuddled up with my family - maybe pajamas all day, some Scrabble or Sequence (or Candyland for the kids), music playing, candles flickering, dogs snoring, endless grazing; the laughter, the sidebars, the deep breaths (you know the ones), the fun, and the memories,' she shared.

The contrast even extends to the Christmas Eve menu. While the King and his guests likely enjoyed a traditional British spread, the Sussexes opted for a California-style tradition of their own: dim sum take-out.

It is a clear sign that the couple is continuing to forge their own path, seemingly content to trade the crown's 'routines and traditions' for a quieter, more personal celebration.

However, as the rift continues, Burrell warns that the lack of place for them at Sandringham isn't a temporary snub.

'There's simply no place for them at Sandringham anymore - there never will be, not even when William becomes king,' he added, underscoring the deep-seated belief that for the Sussexes, the bridge back to a royal Christmas has been well and truly burnt.

IBTimes UK has reached out to Prince Harry and Meghan Markle's reps for comments.