If you’re under 18, the rules change. It is illegal for anyone under 18 to drink alcohol in public unless they are in a pub or restaurant with a meal (and even then, it’s strict). The police can confiscate your booze, fine your parents, or take you home.
So, if you’re 16 and fancy a sneaky cider in the park, the law is not your friend. Sorry, kid. Stick to fizzy pop and let the adults make the questionable decisions.
Underage Drinking: Uk Alcohol Laws Explained | CyAlcohol