Clarence House announced the Duchess’ current condition on their official Twitter account, writing: “The Duchess of Cambridge was unable to attend today’s @TheArtRookUk engagement as she continues to suffer from Hyperemesis Gravidarum. Her Royal Highness sent @The ArtRoomUK a message of support in her absence.”
In her note of apology the Duchess does not allude to her current illness or pregnancy, saying simply: “I am truly sorry that I cannot be with you all today.”
Kate suffered from Hyperemesis Gravidarum during her first pregnancy with Prince George too – we hope she feels better soon, it really it something awful to have to go through.