Tree planting ceremony after coronation of King George VI

The video describes a royal ceremony at Windsor Great Park where princesses welcome guests. Distinguished guests plant oak trees in a newly named Coronation Grove, symbolizing unity across the empire. These trees serve as a living memorial for the first year of a new reign, representing the former British Empire in British oak.

How does the text describe the memory of this gathering compared to others?

What is the new name given to the spot in Windsor Great Park?