Navy Herschel backpack with red zipper pulls

I lost my navy Herschel Little America backpack yesterday around 3pm after leaving Waterstones on Broad Street, Birmingham, West Midlands, near the Library of Birmingham. It's a 28L backpack, navy blue with a gray bottom, white Herschel logo on the front pocket, and red zipper pulls that are easy to spot. Inside there's a small green fabric patch with the initials 'AY' stitched on and a 15-inch laptop sleeve, plus a faded yellow rain cover tucked in the main compartment. The inner lining is slightly worn but the bag is still in good condition overall. This bag holds my uni notes and a photo of my late grandmother—really important to me and I was very attached to it. If found, email [email protected].