Cheering crowds have greeted the Queen in Edinburgh on the day she becomes Britain's longest reigning monarch.
Bad weather delayed her arrival at Waverley Station, but the 89-year-old monarch and the Duke of Edinburgh have now set off on the new Borders Railway.
The Queen will have reigned for 63 years and seven months - calculated at 23,226 days, 16 hours and approximately 30 minutes at about 17:30 BST.
David Cameron said the service she had given was "truly humbling".
Dressed in turquoise with her trusty black handbag at her side, the Queen smiled and waved to those gathered at the station on the day she passes the record set by her great-great-grandmother Queen Victoria.
In the day's main events:
- The Queen and Prince Philip are travelling by train to Tweedbank, in the Borders, with Scotland's First Minister Nicola Sturgeon
- They stopped off in Newtongrange where Her Majesty accepted flowers from well-wishers and opened the new railway station
- A flotilla of historic vessels, leisure cruisers and passenger boats has taked part in a procession along the Thames between Tower Bridge - which opened as a sign of respect - and the Houses of Parliament
- HMS Belfast sounded a four-gun salute
- After 13:00 - Upon arrival at Tweedbank, Her Majesty will formally open the £294m Scottish Borders Railway, after which she is expected to make a short speech
- Follow our live coverage here and on the BBC News Channel.
Her Majesty's Milestone
