With respect, that is not the point, naomi. It is about the Grenadier Guards no longer having Andrew's affiliation before they next troop the colour.
I wonder what happens to his title of KG?
The Most Noble Order of the Garter is an order of chivalry founded by Edward III of England in 1348. It is the most senior order of knighthood in the British honours system, outranked in precedence only by the Victoria Cross and the George Cross. The Order of the Garter is dedicated to the image and arms of Saint George, England's patron saint.