They aren’t as strict as other european countries, however. In other places you immediately lose your license, pay a heavy fine and could go to jail depending on the circumstances.
And she’s the only one they’ve ever done this to. Since they are pretty lenient in general to criminals over there, and punish those who self-defend themselves harsher than the criminals that get injured while committing crimes, I suspect she had a very long and hellish record of offenses before they finally slapped this on her.
The last time I was in England, there seemed to be a lot more public drunkenness than I’m used to seeing in the US. It could be just that the young people were drinking in public places rather than at parties inside houses, I guess.