Navy scarf with light-grey stripes

I lost my navy blue scarf with thin light-grey stripes yesterday around 3pm outside the Peace Gardens by the City Hall in Sheffield. It's a Marks & Spencer wool scarf, about 180 cm long, soft to the touch, with a small moth hole near the left end and a tiny brown leather tag sewn to the inside with the initials AK. It was a gift from my grandmother, so it has sentimental value and I really need to find it. If someone happened to pick it up, I'd be grateful to get it back.