Who made the Queen's hat?

Could you elaborate on the intriguing question, "Who made the Queen's hat?" This query piques my curiosity as it delves into the realm of royal fashion and craftsmanship. Surely, the hat worn by the Queen, a symbol of elegance and tradition, must have been crafted by an exceptional artisan. Is it a renowned milliner who specializes in creating exquisite headpieces for royalty? Or perhaps, it's a lesser-known designer who has managed to capture the essence of the Queen's style. I'm eager to uncover the mystery behind the creator of this iconic accessory, as it undoubtedly reflects a meticulous blend of artistry, craftsmanship, and respect for the monarchy's timeless traditions.