It’s hard to be a metric person in the UK.
Metric measures became legal in the British Empire in 1873 but it appears that your typical Brit will never accept them. There are several societies who appear to have the sole purpose of opposing metrification in the UK, and those who have been convicted of illegally selling items priced only in imperial measures are referred to as Metric Martyrs. Meanwhile, distances are given in feet, yards and miles; weights are given in ounces, pounds and stones (14 pounds, if you care!); volumes are given in fluid-ounces and pints; and temperatures are given in both Celcius and Fahrenheit. Even older measures are still in use too: allotments are still defined in rods, poles and perches – and I’m not even going to try and explain what they are….
It seems that those who oppose metrification are winning at the moment. It is legal to price and sell things in pints, pounds and ounces – just as long as you have an equivalent metric measure displayed as well. The only exceptions are beer and cider on draught, which can be sold in pints, and only in pints.
Of course, the price has gone up, the containers are heavier and more awkward to use, and frankly, it just looks all wrong.
Then people wonder why you end up with a situation like this where the wrong units were used, and NASAs Mars Climate Orbiter crashed and burned.
And before anyone jumps down my throat, yes I know that the Imperial System is different to the American system, despite both including pounds, ounces, fluid-ounces, miles etc. One more cause of confusion.