Navy North Face Borealis backpack with orange zips

I lost my navy North Face Borealis backpack yesterday around 3pm outside Winchester Cathedral on High Street. It's a medium-sized pack in decent shape, with bright orange zipper pulls and a lime-green carabiner clipped to the front loop. There's a coffee stain on the bottom corner, the inside tag has my initials 'PK' in permanent marker, and I stuck a small fox sticker on the inner pocket. Inside I had a sketchbook, a metal water bottle, and a folded map of the New Forest. This backpack is sentimental to me because it was a gift from my sister, and I really need it back.