Limited-edition vinyl records set

I lost my limited-edition vinyl records set yesterday around 3pm near the Library of Birmingham on Broad Street. It's a three-LP gatefold in a black sleeve with a white Aural Waves logo, tucked inside a dark green slipcase with a gold crest. The set is numbered 001/500 and includes a folded poster with a unique band illustration. It has sentimental value—my sister picked it out for my birthday, and I’ve been really hoping to get it back. If anyone spotted it, let me know; I can describe the coffee stain on the back cover and the small dent on the gatefold.