Queen Elizabeth II becomes Britain's longest-reigning monarch
9 September 2015
Queen Elizabeth II becomes Britain's longest-reigning monarch later when she passes the record set by her great-great-grandmother Queen Victoria.
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.
We will be having our own special cream tea and sandwiches later to mark this special occasion.
