The Queen's state funeral takes place later today, 11 days after the UK's longest-reigning monarch died at the age of 96.
Thousands of people have waited to see the Queen lying in state at Westminster Hall, with the queue now shut and having reached capacity.
About 2,000 mourners, including royalty and heads of state from around the globe, are expected to be at Westminster Abbey for the funeral service.
The late monarch will then make her final journey from London to Windsor.
The procession will follow A roads rather than the M4 in order to give as many members of the public as possible the chance to line the route.
People have been warned to avoid driving in parts of London, with one of the UK's biggest ever transport operations to take place as around a million people descend on the capital.
Road closures will start to come in on the A4 and the A30 from 6am, with full closures in both directions after 10am, which are not likely to be lifted until the evening.
Multiple closures on local roads along the A4 route will also be in place.
People looking to drive around central, west and south-west London are advised to check before they travel, and to allow extra time for the journey and expect long delays.
A commission service will then be held at St George's Chapel in Windsor during the afternoon, at which point the Queen will be reunited with Prince Philip in the royal burial vault.
In a private evening ceremony, both will be then laid to rest in the King George VI memorial chapel, where the Queen's parents George VI and the Queen Mother, as well as her sister Princess Margaret, are all interred.
Here is a rundown of how a historic day is schedule to unfold:
6:30am - Westminster Abbey shuts to the public
8am - First arrivals at Westminster Abbey
10:35am - Coffin moved from Westminster Hall to Westminster Abbey
11am - Funeral begins
12:15pm - Procession sets off for Wellington Arch, public’s first view
3pm - Coffin is moved into the hearse and driven to Windsor
4pm - Second service at St George’s Chapel in Windsor for 800 people
7:30pm - Private service for members of the royal family
8:30pm/9pm - Royals likely to leave the service
