By Kate Hogan
Updated May 06, 2011 04:00 PM

Alan Carsen/Whitehotpix/Zuma; Inset: Courtesy London Sole

The Duchess of Cambridge swapped her Alexander McQueen heels for basic ballet flats on Wednesday during a routine trip to the grocery store. Skipping through the parking lot of her local Waitrose supermarket in Anglesey, Wales, Kate wore one of her favorite styles, the brown patent crocodile Pirouette ($165), from luxe British brand London Sole. A spokesperson for the company tells PEOPLE that the classic style is one of Kate’s go-to designs, and confirms that the newlywed is a regular in both the King’s Road and Knightsbridge stores. “She prefers the Pirouette or the Henrietta shapes and always in neutral colors,” the spokesperson shares, adding, “she’s been coming to us for a good few years now.” Founded by shoe designer Jane Winkworth, the brand was a favorite of Princess Diana in the 1990s. “We have a history with the royal family,” the spokesperson explains, “so it’s great to see the younger royals wearing them too, like Kate and Princess Beatrice and Eugenie, who are both regular customers.” —Monique Jessen