Hair expert Brett MacDonald from CULT Hairdressing weighed in while speaking with Hello! Magazine. “When the hair is twisted before rolling it up, wrapping closer to the head each time, it causes the hair to self-tighten and lock in the base,” he explained.

“It works particularly well with long hair and we, hairdressers, use it all the time on wet hair to secure it without clips or pins when leaving the basins,” he continued. “I love the effortless elegance the Princess of Wales demonstrated, clearly showing that she has practised and applied it previously.”

Once again, Kate proved that even the smallest change can make a big impression.