The ban has also been confirmed by former royal chef Darren McGrady , who revealed that palace chefs are forbidden from serving food containing too much onion or garlic.

Meanwhile, it’s been reported that it was Sarah who convinced her ex-husband that they should stay at Royal Lodge this Christmas in light of the ongoing spy scandal – even at the expense of her own Sandringham invitation.

Just last year, Sarah was invited to join the Royal Family for the festive celebrations for the first time since 1991. And her delight was clear to see as she walked to church alongside her ex-husband and their daughters, warmly greeting well wishers and eagerly chatting with members of the public.

While the 65-year-old will no doubt be disappointed that she and Andrew are no longer able to attend, she remains incredibly supportive of her ex. In a new interview with the Times, which took part “before recent revelations about Prince Andrew” but published after the event, she spoke about her love for the late Queen’s second son.

“I was totally and utterly in love with Andrew. I would do it all over again, 100 per cent,” she admitted. “He’s the best, a great man with a great heart, and kind. Our wedding was the best day of my life. But I gave up my anonymity that day. I was able to because love conquers all. It’s still with us today. I won’t let him down. He supports me as much as I support him. He’s supported me through thick and thin, not just marriage or divorce. We agree on the three Cs — communication, compromise, compassion.”

Andrew and Fergie split in 1992, and divorced in 1996, but they still live together at Royal Lodge in Windsor. In the same article, Sarah’s sister Jane shared, “Sarah and Andrew are the best divorced couple I know. They’ve done it for their children; it’s incredible.”