A royal supporter holds Queen Elizabeth II and Union flags on the Mall PIC: Paul Ellis/PA Wire

Preparations began early this morning in Pall Mall for the royal procession by the Queen from Buckingham Palace.

Police arrive in the Mall, London PIC: Anthony Devlin/PA Wire

The Queen progressed to St Paul’s Cathedral for a service, also attended by Prince Charles, the Duchess of Cornwall, the Duke and Duchess of Cambridge and Prince Harry.

Prime Minister David Cameron led the large representation from the coalition Government and other figures will include governor generals, diplomats and foreign leaders.

After the service the Queen will attend a reception at Mansion House while other senior royals including Charles and Camilla will attend a similar event at the Guildhall. At both events will be members of the thanksgiving congregation.

The Queen and her family will then attend a City of London Livery companies lunch at Westminster Hall.

The highlight of the day will be a glittering carriage procession through the streets of Whitehall before the Queen and her family gather on Buckingham Palace’s balcony to watch a flypast of Second World War aircraft and the Red Arrows.