It isn’t just a British thing, though I think the national self-flagellation is.
I worked for a large manufacturing company that used to fly in our customers from individual countries in for product launches. The Scandinavians were on another level. They make the ‘English Abroad’ look like a group of old ladies sipping a sweet sherry.
One Friday, about 11am, I hear what sounded like a coach load of football hooligans. The Norwegian lot had arrived, they staggered off a coach fresh from Manchester airport. They were all absolutely paralytic. Literally falling over pissed! There were 18 instead of 22 of them, as the rest of them hadn’t been allowed on the flight as they were deemed too leathered to fly by the cabin crew. Most of them then fell asleep through the product launch then headed into town to enthusiastically re-commece drinking.
And the Russians… sweet baby Jesus and the orphans!!! You’ve never seen drinking until you’ve been out with some Russians. I think they just drink 24/7