Black leather briefcase with red interior

I lost my black leather briefcase yesterday around 3pm outside the Library of Birmingham on Broad Street, near Waterstones. It's a medium-sized briefcase, a bit worn with a brass clasp and a noticeable dent on the bottom-right corner. Inside is a padded sleeve for a 13-inch laptop, a spiral notebook with my grandmother's handwriting, and a green leather key fob stamped with the initials PK. The red interior lining makes it easy to spot. This briefcase means a lot to me, and I really need it back.