Gun-toting cops in the Strand add a sobering note to the party.
Preparations are well underway for a street party in Enfield today - complete with the Enfield Sea Cadets.
With the weather forecast, let's hope they've been brough their dinghies...
Among the guests having lunch with the Queen at Westminster Hall is Tanya Whyte from Brixton.
She was invited because of the work she does with Ebony Horse Club, a charity that gives disadvantaged children the opportunity to learn to ride.
Our reporter Ria Chatterjee caught up with her ahead of the big day.
Queen Elizabeth II has worn three dresses, designed and created by Angela Kelly, during her Diamond Jubilee celebrations this weekend.
On the left is her outfit for Tuesday's service of thanksgiving and carriage procession - a dress of fine silk tulle with mint green and silver embellishments, a mint green chiffon drape scattered with Swarovski crystals, and a hat covered in the same fabric.
In the centre is the gold lame cocktail dress that The Queen wore to Monday night's concert, with sweeping trimmings of antique gold lace and Swarovski crystal adornments.
On the right is the silver and white dress and coat worn for the Thames river pageant. It was created from white boucle, threaded throughout with silk ribbon, embroidered with gold, silver and ivory spots and, once again, embellished with Swarovski crystals.
Princess Beatrice wore a Kinder Blue coat dress and a hat by Stephen Jones.
Princess Eugenie wore a purple dress by Suzannah and a hat by Stephen Jones.
The Duchess of Cambridge wore a nude-coloured lace dress by Alexander McQueen, the same label she chose for her wedding day and for Sunday's river pageant.
Her hat was designed by Jane Taylor.