The Princess Royal has remained devoted to duty ever since the death of Queen Elizabeth II.
She boarded the plane carrying her mother’s coffin from Edinburgh to London on Tuesday, ahead of the country's longest-serving monarch's funeral on Monday.
Anne has issued a statement paying tribute to her late mother, saying: “It has been an honour and a privilege to accompany her on her final journeys.”
She added: “Witnessing the love and respect shown by so many on these journeys has been both humbling and uplifting.”
Princess Anne and Sir Timothy Laurence
POOL
Queen Elizabeth II's coffin
Murdo MacLeod/The Guardian
The plane was previously best known for evacuating thousands of people fleeing the Taliban in Kabul last summer.
The “heavily used” C-17 Globemaster was also deployed to take humanitarian aid and weapons to Ukraine following Russia’s invasion earlier this year.
Anne’s full statement said: “I was fortunate to share the last 24 hours of my dearest mother’s life.
“It has been an honour and a privilege to accompany her on her final journeys.
“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.
“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.
“To my mother, The Queen, thank you.”