Angelina 18 in the UK for all alchohol unless you're drinking in a restaurant accompanied by an adult, in which case it's 16. It's confusing.
At 16 of course you could until recently get married, join the army, leave home (or get thrown out of home if you have annoyed your parents enough ๐ ), change your name, give blood, and of course have sex. But you can't drink except in very limited circumstances.