Post-Brexit service in London has genuinely become very bad, on average. It’s just incompetent half the time. I can’t count the number of times I’ve walked into a mid-market restaurant and waited several minutes for someone to greet me. I can live with crappy service, but I don’t buy this narrative of ‘sincere Brits vs fake Americans’. Most Americans in the service industry seem genuinely to be trying to do a good job, even if there are layers of fake friendliness on top of that. Most British people in service jobs seem genuinely not to give a shit (which is fair enough - I wouldn’t either).