How do Brits use Imperial and Metric units of measurement?

I wouldn't say moving to metric failed, exactly. It was never planned to fully transition due to the problems going fully over. I've not had to use Imperial weights, temperature units, volumes, or lengths for ~30 years with these exceptions: * Long distances and speeds tend to be measured in miles rather than kilometers. You wouldn't use ft/s or any imperial unit smaller than a meter unless you're a wargamer or RPG player where inches and feet are still used variously. The games could convert (and do in other countries) but it doesn't matter in the least. Km are starting to be used for shorter distances like walks and runs. * Yards are still used in distances on the road but only in the sense that we have signs that countdown to junctions in hundreds of yards, but a yard is basically a meter anyway and I don't need to know exactly how far 300 yards is so it doesn't really matter. Seeing 3...2...1... before a junction is handy, distance irrespective. * Fuel is measured in liters when you buy it but efficiency is in miles per gallon for some silly reason. I drive electric now anyway so that's the only time I'd use gallons completely removed. * Alcohol bottles are measured in millilitres but you buy a pint of beer. Milk is likewise measured in pints but the shops have to display both units for it. Most people just buy them by vague comparison ("Get a bottle of the tall, thin one" "You think that will be enough? I could get the tall, fat one?"). * There are some specific industries where Imperial is still used. I think I remember hearing that gold trade, of which Britain is a significant entity, still uses it. As a non-gold trading IT Systems Engineer who buys bottles of alcohol or spirits, the only time I use Imperial is when I'm driving or working out how many 1" squares that Ork is away from me and whether my spell (with a range of 100ft) is therefore in range since each 1" square represents 5ft. My temperature is in ⁰c, the size of my house is in metres, my fruit is bought by the gram, and the milkman delivers my milk in bottles (or I buy an extra small one at the shops).