Senior politicians including Boris Johnson, the former prime minister, have referred to Elizabeth II as the Great since she died last Thursday at the age of 96.
Lena Tindall has turned four and her parents Zara and Mike Tindall looked like they were getting into the swing of the day, as a photo on Insta showed them holding a huge arch of colourful balloons.
The 22-year-old London Contemporary Dance School student will interact with a huge dragon puppet at the Let s Celebrate part of the show as she depicts the monarch in her younger years.