It was a quintessentially British occasion, with weather to match.
The sky over the Thames was a steely, unbroken grey. The vast crowd certainly needed their umbrellas.
The Queen and other members of the royal family have taken part in a flotilla of more than 1,000 boats that made its way along the Thames in the Diamond Jubilee river pageant.
Some 1.2 million people gathered in central London to watch the pageant and cheer on the royal barge, the Spirit of Chartwell, in the centrepiece of celebrations marking 60 years of Her Majesty’s reign.
Bells rang out to mark the start of the pageant, and among those in the flotilla were narrow boats, tugs, Dunkirk little ships, pleasure cruisers and steam boats.
Bridges and embankments were filled with spectators, all desperate to catch a glimpse of the myriad of vessels passing by.
The Queen and Duke of Edinburgh were joined on their vessel by the Prince of Wales and Duchess of Cornwall, as well as Prince Harry and the Duke and Duchess of Cambridge.
The royal barge, decorated with 10,000 flowers from the royal estates, began its journey from Cadogan Pier in west London.
The 86-year-old monarch wore a silver and white dress and matching coat – an outfit that has been a year in the planning and was designed by the royal dresser Angela Kelly.
Its colour scheme was chosen to stand out against the red, gold and purple hues of the royal barge.
After travelling for around seven miles through the capital, the royal barge moored just past Tower Bridge, as heavy showers began to fall.
The Queen then braved the rain without an umbrella and stood under an ornate canopy to watch the spectacle of the flotilla, that had been travelling behind her.
The boats passed under all 13 central London river crossings from Battersea Bridge to Tower Bridge in what was thought to be the largest live public event ever held in London.
The pageant was brought to a close with an orchestra playing Land of Hope and Glory, Rule Britannia and the national anthem.