The Prince and Princess of Wales have released a photo to mark their 15th wedding anniversary. The image sees the couple lying in the grass with their three children, Prince George, Princess Charlotte and Prince Louis, and their dogs. The royals wed on 29 April, 2011 at Westminster Abbey in London, but the pair have been in a couple since 2003. The image was shared on Instagram alongside a heart emoji and the caption: “Celebrating 15 years of marriage.” Naturally, fashion fans quickly identified Kate Middleton ’s look. Rarely putting a sartorial foot wrong, the princess can be seen wearing a classic spring combo, styling a Breton knit top with a pair of white cigarette trousers. Returning to one of her favourite British labels, Holland Cooper, for the trousers, Kate Middleton’s perennially chic top hails from the American label Veronica Beard. Both pieces are still available to shop, albeit in different colourways – here’s everything you need to know.…