Grey Samsonite suitcase with red luggage tag

I lost my grey Samsonite suitcase yesterday around 3:30pm outside the Cardiff Central Library on Westgate Street. It's a medium-sized hard-shell with a matte charcoal finish and black corner protectors. There’s a bright red luggage tag with my initials 'AR' on the handle, and the inner lining is blue with a zipper divider. One zipper pull has a tiny dent from a gate at a hostel; there’s also a small sticker from a weekend trip to Bath. It has sentimental value because inside is a travel journal and a family photo album, really hoping someone might spot it and get it back.