The former royal attended her granddaughter’s christening last week

Sarah Ferguson “has no idea where she is going” after leaving Royal Lodge next year, according to a royal author.

Ms Ferguson has been looking for a new place to live after her former husband, Andrew Mountbatten-Windsor, was served notice on his lease on the Grade II mansion.

Royal author Andrew Lownie has claimed that the former Duchess of York is having issues downsizing her belongings.

He said: “Not sure Sarah herself knows where she is going. Switzerland, Portugal, Cotswolds, Windsor, London. For the moment she can stay at Royal Lodge until October.”

Sarah Ferguson has not worked out where she is moving after leaving Royal Lodge | GETTY

While she may have time to sort her belongings, staff are reportedly baffled by the sheer scale of the moving operation.

Mr Lownie claimed: “I wrote in Entitled that at Sunninghill Park, there was a warehouse style room nicknamed ‘Aladdin’s Cave’ which contained thousands of gifts.

“Similarly I’m told that there are so many unopened Amazon boxes at Royal Lodge that nobody knows quite what to do with them.”

The former duchess has been known for living an extravagant lifestyle; in his book Entitled, Mr Lownie alleged that by 1995, Ms Ferguson had accumulated debts totalling £3.7million.

A former staff member claimed to the author that the 66-year-old would organise feasts for herself and her two daughters, with food being wasted.

The former employee stated: “Every night she demands a whole side of beef, a leg of lamb and a chicken which are laid out on the dining room table like a medieval banquet that would make Henry VIII proud.

Sarah Ferguson has been well known for her extravagant spending habits | GETTY

“But often there is just her and her girls, Bea and Eugenie, and most of it is wasted. There is no attempt to keep it to have it cold the next day. It just sits there all night, and the next day it’s thrown away.”

The author added: “Over the previous year Sarah had travelled to Puerto Rico, Bermuda, Switzerland, Hong Kong and Poland and made four trips to America, each time staying at the luxury Carlyle Hotel, where the cheapest suite was £330 a night.

“In a three-day visit to New York, she had one car to take her to the airport and another for her ten suitcases, all tissue-lined, with more outfits than she could hope to wear.

“Her assistant Christine Gallagher had once been sent on Concorde, at a cost of £5,000, to bring her some paperwork.”

The former Duke and Duchess of York had their first royal outing following the removal of their royal titles in October when they attended the christening of their granddaughter Athena.

Princesses Beatrice and Eugenie were reunited with their parents at a christening last week | GETTY

After the ceremony, singer James Blunt was spotted among those invited to join the post-ceremony festivities.

Andrew and Ms Ferguson were absent from the pub gathering, while they had attended the christening itself, they chose not to continue to the celebration.