The Queen has thanked well-wishers at home and overseas for their “touching messages of kindness” as she becomes Britain’s longest-reigning monarch.
Speaking in the Scottish Borders, the 89-year-old monarch said the title was “not one to which I have ever aspired”.
At 17:30 BST she had reigned for 23,226 days, 16 hours and approximately 30 minutes – surpassing the reign of her great-great-grandmother Queen Victoria.
David Cameron said the service the Queen had given was “truly humbling”.
Dressed in turquoise with her trusty black handbag at her side, the Queen spoke briefly to the gathered crowds earlier.
“Inevitably a long life can pass by many milestones – my own is no exception – but I thank you all and the many others at home and overseas for your touching messages of great kindness,” she said.
The exact moment the Queen became the longest-reigning sovereign is unknown. Her father, George VI, passed away in the early hours of 6 February 1952, but his time of death is not known.