Westwood's work incorporates household and Prism effect paint, enamel paints, inks, glitters, diamond dust, acetate and digital mediums. Often focused on nature, she uses light and colour to evoke an ethereal feeling, combining mediums to produce modern illustrations with a traditional feel. Westwood's vast experiences range from magazine and book illustration, greeting card design, advert illustration, photography backgrounds, logo design, private commissions, fine art, fashion, retail, and prints. Some of her past clients include Stylist Magazine, Gardening Which? Magazine, John Lewis Autumn/Winter fashion advert illustrations and full illustrations for the children's books Waiting and The Hippo Club.