Gray Nike sneakers found near Broad Street

I found a pair of gray Nike running shoes this afternoon around 1:45pm outside Blackwell's on Broad Street in Oxford. They're UK size 9, with white soles and a bright neon-green heel tab on the left shoe. One lace is slightly frayed and there’s a tiny red stain on the sole near the toe. I picked them up off the pavement behind a planter near the entrance after someone nearby pointed to them. If the owner recognizes these features, please reach out—we'd love to get them back; they look well-worn and obviously meaningful.