Lost golden retriever named Max near the river in East Midlands wearing a blue collar with a tag and a small scar on his right ear.

I lost my golden retriever, Max, while taking him for a walk near the river in East Midlands. He's very friendly and loves to play with other dogs and people. He was wearing a blue collar with a tag, and he has a small scar on his right ear. I can't stop worrying about him, and I'm hoping someone has seen him or can help bring him back home.