@Mallard4468 posted:UK is shown as "mixed". That's for sure. Instead of calling it O scale or O gauge, or 1:48/1:45/1:43.5/1:43, they call it 7mm to the foot (except when they don't). Took me forever to figure that out. Why would anyone express a scale as a ratio of metric to imperial? Of course, it's from the same folks who choose to use 1:148 for N scale and run standard gauge 1:76 models on HO track, which ends up being narrow gauge.
Jerry