Technoglitch
Core Member
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.
Prime Minister David Cameron will lead tributes in the House of Commons and there will be a River Thames salute.
The Queen, who is 89, will spend the day on official duties in Scotland.
In the day's main events:
Queen Elizabeth II becomes longest-reigning UK monarch - BBC News
Prime Minister David Cameron will lead tributes in the House of Commons and there will be a River Thames salute.
The Queen, who is 89, will spend the day on official duties in Scotland.
In the day's main events:
- 10:20 BST - the Queen and Prince Philip are due to arrive at Edinburgh Waverley Station from where they will travel by train to Tweedbank, in the Borders, with Scotland's First Minister Nicola Sturgeon
- 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, after which she is expected to make a short speech
Queen Elizabeth II becomes longest-reigning UK monarch - BBC News
