Hundreds of thousands of mourners travelled from across the globe to Westminster Hall to pay their respects to Queen Elizabeth II as Britain's longest-serving monarch was lying in state over the last few days.
A number of Royal Guards have been standing vigil around the Queen's coffin throughout this time in the ancient hall, right up until the doors closed ahead of the Queen's historic state funeral. After completing their final 14 hours, the guards who'd been standing vigil at the Queen's coffin until the end shared an emotional farewell for their "last official duty" for the monarch in a touching tribute.
Follow the latest updates of Her Majesty's funeral as the world mourns Queen Elizabeth II on our live blog .
Daniel Benson - who has served 28 years in the British Army - shared a heartfelt message on Twitter documenting his and fellow guards' final goodbye.
He wrote: "0800 this morning taken just as we finished our last vigil watch over a 14-hour period.
"My (our) last official duty for HM Queen Elizabeth II."
The photo, which was taken at 8AM Sunday morning, captured four of the guards at their final and official act of service for the monarch.

Gushing members of the public took to the comment section of the post to share their thanks for the guards' outstanding service during the nation's mourning of the Queen.
One user wrote: "Well done mate. A fantastic job by all involved."
Another penned: "Great work. You have all done this country proud. Many, many thanks to you all."
"Well done. You have done Her Majesty and everyone so proud thank you all xx," a third added.
"Thank you for looking after our Queen," a fourth said.
A different user commented: "Thank you for your service to your country while on active military duty, and for this service to our Queen as the world pays its respects.
"I hope you all got to go home to a long hot bath after standing still for so long. (People have NO idea how hard that is...)."
The Queen lived her entire life with a team of dedicated and loyal staff, so it was no doubt that this final duty was an emotional one.
Throughout the three days when members of the public visited the Queen's lying in state, officials estimated that 750,000 people saw the coffin with the line stretching several miles along the south bank of the River Thames, past landmarks such as Tower Bridge and a replica of Shakespeare's Globe Theatre, crossing Lambeth Bridge as it neared Westminster Hall.
Millions of people across the nation and more from around the world will watch the Queen's funeral to say goodbye to Britain's longest-reigning monarch.
The monarch is going to be buried in the King George VI Memorial Chapel, an annexe of St George's Chapel at Windsor, rather than Westminster Abbey, as tradition used to see.
The funeral is expected to be the most watched global broadcast in history with figures predicted to reach approximately 4.2 billion watchers.
You can now buy the historic Daily Mirror commemorating the death of the Queen here: mirror.co.uk/commemorative