> The UK uses imperial units for most of the things you use units for in daily life (roads, cooking, drink sizes, body weight, utilities, land area...)

Not really. Old people might cook with funny old temperatures/measures and weigh themselves in stones, but it's fading out, contemporary cookbooks and gym culture are all metric. I've literally never seen a utility bill in anything other than metric (even if it's slightly weird metric like kWh or cubic metres of gas).

_Human_ body weight. I grew up measuring everything in kilos apart from people, which has I guess what amounts to its own wholly idiosyncratic scale, the stone, that no one I've since met outside of the UK has heard of.