Queen Elizabeth's coffin bearers were specifically chosen to protect her body after her death.
Soldiers from the Queen's Company, 1st Battalion Grenadier Guards, were chosen to lift the coffin during the service at Westminster Abbey and Windsor Castle. Although a senior officer took day-to-day control, all of the former sovereign's men will pay tribute to her during the service.
On the day the Queen died, the unit was deployed on operations in Iraq, and was returned from operations. Former British Army soldier Major Adrian Weale told the PA news agency: "They became the Queen's Company immediately after the death of George VI and the Queen has been commander ever since.
READ MORE: Merseyside falls silent to remember Queen Elizabeth II
"It's their role to protect her body, both in life and in death, remaining the Queen's Company until King Charles decides otherwise.
"Their duties will then be transitioned to the next monarch."
The coffin will travel from the Palace of Westminster to Westminster Abbey for the service at 11 am. A public procession will begin at 12.15 pm as the Queen's coffin makes the 1.5-mile journey from Westminster Abbey to Wellington Arch in London.
The state hearse will then carry it to Windsor in Berkshire, where the Queen will be laid to rest. Major Johnny Hathaway-White, 36, from Wiltshire, will lay the Camp Colour of the Captain of the Queen's Company at Windsor Castle after it is placed onto a catafalque - a raised platform.
READ NEXT
- BBC viewers 'heartbroken' by David Attenborough's appearance at Queen's procession
- Prince Harry now allowed to wear military uniform for Queen's vigil
- How much will The Queen's Funeral cost and who will pay for it?
- Queen's Funeral Bank Holiday and who will still have to go to work
- The day Queen Elizabeth II died as it unfolded
You can light a candle for Queen Elizabeth II here or leave a tribute to her here
