Queen arrives at Edinburgh Waverley stationpublished at 11:14
The royal party arrives at Edinburgh Waverley station, watched by the crowds gathered there.
Summary
Queen Elizabeth II becomes Britain's longest-reigning monarch
Prime Minister David Cameron leads tributes in the House of Commons
The Queen makes a brief speech as she opens Scotland's new Borders Railway
She says: "A long life can pass by many milestones. My own is no exception."
The record was held by her great-great-grandmother Queen Victoria
A flotilla of historic vessels, leisure cruisers and passenger boats take part in a procession on the Thames
Queen arrives at Edinburgh Waverley stationpublished at 11:14
Royal party arrives at Edinburgh Waverley stationpublished at 11:12
The royal motorcade has now arrived at the train station - about 40 minutes behind schedule. The National Youth Pipe Band of Scotland played as the Queen and Duke of Edinburgh left their limousine, to cheers from the crowds.
Queen's helicopter lands in Edinburghpublished at 11:07
Here's the Queen exiting the helicopter which brought her to Edinburgh. She's now being taken to meet the crowds at Edinburgh Waverley station in a limousine.
When a pint of beer cost 9p in 1952...published at 11.:06
When the Queen came to the throne in 1952, the average house price in decimalised money was £1,888, a pint of beer cost 9p and a pint of milk 3p.
Now, the average house price is £277,000, a pint of draught bitter sells for £2.97 and a pint of milk sets you back 43p.
The Queen arrives in Edinburghpublished at 11:04
The Queen - wearing a blue outfit - has arrived at Holyrood by helicopter. She is now making her way to Edinburgh Waverley station by car.
Reflections on the Queen's reign by BBC reporterspublished at 11:03
The BBC's Alastair Leithead has been back to Kenya where Princess Elizabeth became Queen in 1952. His report is followed by stories from other Commonwealth countries.
Media caption, BBC reporters reflect on the Queen and the Commonwealth
Fog means further delays for royal partypublished at 10:53
BBC Royal correspondent tweets:
Waiting around for Her Majesty...published at 10:52
The Queen's delayed arrival, because of weather conditions, means those gathered at Edinburgh Waverley station have to wait a bit longer before the royal visitor arrives, as pictured by the BBC's Philip Sim.
This also applies to Scotland's First Minister Nicola Sturgeon - might be time for her to have another cup of tea while she waits.
Crowds gather at train station with union jackspublished at 10:50
Image source, PAWherever the Queen goes, she is greeted by crowds waving the union jack - and today is no exception. A smartly-dressed Emily Smith is seen here in Edinburgh eagerly awaiting the arrival of the royal party.
BT Tower broadcasts message for the Queenpublished at 10:47
Image source, Getty ImagesThe BT Tower is displaying a special message to mark the occasion, with the words "Long may she reign" scrolling around the central London landmark.
Royal arrival in Edinburgh delayedpublished at 10:42
An update on the Queen's arrival at Edinburgh Waverley station - this has been delayed for 40 minutes due to weather conditions.
She is due to travel from Balmoral by helicopter and make the final part of the journey by limousine.
Main events of the Queen's historic daypublished at 10:36
Here are some of the main events due to take place in the next few hours:
- 12:00 - a flotilla of historic vessels, leisure cruisers and passenger boats will take part in a procession along the Thames between Tower Bridge - which will open as a sign of respect - and the Houses of Parliament
- 12:05 - HMS Belfast will sound a four-gun salute
- 12:40 - Her Majesty will formally open the £294m Scottish Borders Railway
Scottish pipe band prepares for Queen's arrivalpublished at 10:34
BBC Scotland journalist tweets:
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End of twitter post'When I met the Queen'published at 10:32
Image source, PAWe've been asking you to tell us about moments you've shared with the Queen during her reign.
Here are 63 memories that have been sent in - one for each year that she has been monarch.
Her Majesty due to arrive in Edinburghpublished at 10:31
The Queen and Prince Philip are due to arrive at Edinburgh Waverley station shortly, from where they will travel by train to Tweedbank, in the Borders, with Scotland's First Minister Nicola Sturgeon.
New official photographs releasedpublished at 10:27
Image source, Buckingham PalaceA new photograph of the Queen, taken by Mary McCartney, has been released by Buckingham Palace to mark today's milestone.
It shows her in her private audience room at the palace, where she holds weekly audiences with prime ministers of the day, and receives visiting heads of state and government.
Counting down in numberspublished at 10:23
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.
The exact moment the Queen reaches the milestone is not known because her father, George VI, passed away in the early hours of 6 February 1952 - probably around 01:00 GMT.
Marking out a historic daypublished at 10:20
Welcome to our coverage of Queen Elizabeth II's record-breaking day, as she becomes the nation's longest-reigning monarch. A host of commemorative events are planned to mark the occasion, so follow this page for all the latest updates.