Princess Anne has remained by the side of her "dearest mother" the Queen's for her final 24 hours at Balmoral.
The Princess Royal said it was both an honour and a privilege to be a part of Her Majesty's last remaining journeys before she passed away on Thursday.
Despite failing health, Queen Elizabeth II remained fiercely loyal to her official duties which she continued right up until the end.
The last public images of the monarch showed her walking with a cane and meeting new prime minister Liz Truss, two days before her death.
In a touching statement, Princess Anne said "I was fortunate to share the last 24 hours of my dearest mother's life" and recalled the unique memories we all share with the monarch.
"It has been an honour and a privilege to accompany her on her final journeys," she continued.
"Witnessing the love and respect shown by so many on these journeys has been both humbling and uplifting.
"We will all share unique memories. I offer my thanks to each and every one who share our sense of loss.
"We may have been reminded how much of her presence and contribution to our national identity we took for granted."
The Princess Royal also gave thanks to her older brother King Charles III, who automatically became monarch when the Queen died.
She said: "I am also so grateful for the support and understanding offered to my dear brother Charles as he accepts the added responsibilities of The Monarch."
In her final comments, she gave one last tribute and said: "To my mother, The Queen, thank you."
Princess Anne was absolutely there, dutifully and resolutely as she was by her mother’s deathbed on Thursday, alongside her husband Sir Timothy Laurence.
She was the first to sound the family alarm, as she was marching with her siblings behind the hearse in Scotland on Monday.
The Queen's only daughter, Princess Anne also accompanied her mother's coffin on its flight from Edinburgh to RAF Northolt in west London on Tuesday evening.
After gaining the reputation as a stoic daughter who once admitted she was not “everyone’s idea of a fairytale princess”, Princess Anne was later known as the hardest working royal - carrying out over 20,000 engagements, characteristically without fanfare or fuss.
She will follow her mum's coffin by car during the royal procession on Wednesday when the late monarch's will make the journey from Buckingham Palace to the Palace of Westminster.
