Blue UK passport with gold crest, slightly worn

I lost my blue UK passport yesterday around 3pm near the Chelmsford train station on Duke Street, outside Costa Coffee. The passport is a deep blue with a gold royal crest on the cover, a bit bent at the bottom-right corner, and the pages inside are a touch worn from travel. There’s a small travel-clinic sticker on the inside cover and a faint coffee stain along the edge from a long trip last month. I have an upcoming international trip and really need it back; it's the only form of ID I have right now, and it contains my name and photo that's essential for boarding. If anyone found it, please reach out—I'd be so grateful to retrieve it.