The Duchess of Cambridge summer wardrobe of style continued today, with two appearances by Kate, at the equestrian event to support Zara Philips (who was superb by the way…), and then at an event at The Royal Academy she wore a beautiful dress by one of my favourite designers, Roksanda Ilincic. But first to the equestrian ground. Kate was in casual mode, wearing the gorgeous Smythe blazer that we first saw during the tour of Canada last summer. Skinny jeans, the Stuart Weitzman wedges and a crisp white shirt completed the look, which had a very preppy edge to it. Every girl needs a smart blazer in their wardrobe, Kate…