shoes off inside

I repatriated to the U.K. three weeks ago, after more than two decades in the United States. I'd been lucky enough to come back at least once a year for most of that time, so it's not exactly like landing on the moon, but there are a few things that are making me scratch my head. I'm not sure whether it's changed since I've been gone, or I just didn't notice it all those years ago.