Cream LuxeLine king duvet cover with blue piping

Hey, I lost my cream LuxeLine king duvet cover yesterday around 3pm outside Costa Coffee on Sadler Gate in Derby Cathedral Quarter. It's 600-thread-count Egyptian cotton, with blue piping and a small monogram 'KP' on the top-left corner. The brass zipper pull has a tiny notch, and the fabric is a little worn at the corners from daily use. It was a gift from my grandmother and has sentimental value, so I’d be heartbroken to find it. If anyone found it, I’d really appreciate getting it back!