Gold bracelet with heart charm and initial M

I lost my gold bracelet yesterday around 3pm near Lincoln Cathedral on Castle Hill, by the gift shop entrance and the cobblestone path. It's a slender 7-inch chain with a small heart charm that has an initial 'M' engraved on the back and a tiny sapphire inlay at the heart. The clasp sticks a bit and there's a slight bend in the chain near the clasp, so it looks a little uneven when worn. It has sentimental value—my grandmother gave it to me, and I really need it back.