Border collie Milo missing near Wapping Wharf, Bristol

Lost my border collie Milo yesterday around 6pm near Wapping Wharf by the Harbourside in Bristol. He's a medium-sized dog, mostly black and white, with a white blaze on his chest and a small nick in his left ear. He wears a blue nylon collar with a round brass tag that says 'MILO' and a phone number. He has heterochromatic eyes—one blue, one brown—and a tiny scar on his right hind leg from a tumble last month. I last saw him near the water by the M Shed area and then he bolted toward Spike Island. I'm really worried—Milo is my constant companion and means a lot to my family. If you spot him, please message me here or check the tag.