The best part of wearing skirts ... or tartan skirt, and there are plenty of timeless options this season. Pick up a red plaid mini from RedValentino or a green check-pleated Gucci midi now ...

wearing the perfect plaid skirt for the occasion. The pleated midi piece is by Emilia Wickstead, and boasts a bright red, green, and white tartan. For her top, Kate opted for a cardigan by Brora ...