It can't have escaped the notice of any dedicated follower of royal style that the Duchess of Cambridge is partial to a colour-block coat (or coat dress) when it comes to dressing for public events.
Indeed, in the last few weeks alone, Kate has been spotted out and about in a vibrant red-orange number by Boden, a Mulberry style in hot pink, the dogtooth print design by Catherine Walker - surely a nod to an iconic Princess Diana look - and a military-influenced burgundy coat by Dolce & Gabbana on the recent royal visit to Scandinavia.
When the Duchess is out and about, though, she certainly commits to the look. What we're trying to say is, if the coat is on, you won't see her taking it off – just as you wouldn't see her grandmother-in-law, the Queen, doing a quick outfit change in the middle of an engagement, or soon-to-be royal Meghan Markle doing the same.
According to 9Honey, this very formal tradition stems from a simple matter of etiquette: it's not considered ladylike for a woman of the Duchess's status to remove their clothing in public, regardless of how smart or situation-appropriate the outfit underneath might be. Should the royals' schedule require a change-up of layers, they'll make the change away from the cameras.
This is just one of the royal style rules that Kate, as a senior member of the House of Windsor, must follow while carrying out public engagements. The Duchess typically eschews a colourful manicure in favour of pale pink nails in the Queen's go-to Essie shade, Ballet Slippers, and opts for either a smart blow dry or carefully groomed up do (a contrast to the laid-back bun recently sported by Meghan Markle for a handful of royal events).
Want to see more of The Duchess' finest maternity moments? Click, scroll and screenshot our gallery of Catherine's best maternity moments yet in the gallery below!