Uk is metric, but we do use a mix. Speed limits are still in mph, and we rarely if ever use kilometres for distances. Height is in ft and inches, and your own weight is in stones/pounds. All other weights are in grams and kg, except for some larger ones (industrial/shipping) which are in tonnes. Pints are used only for… pints, everything else is in ml. And, the best, is “football pitches” which is often used by the news to describe large (but not too large) lengths.

But do you use metric tonnes (1000 kg) and "metric" pints (½ litre, not actually metric, but in use for drinks in metric countries)?

Probably metric tonnes, not sure, it’s just “a lot” when it’s used colloquially. Pints are imperial for drinks, 568ml.

We use metric tonnes.

For pints (only really used for beer and milk), we still use an imperial pint but it's officially specified in millilitres (568ml) and this will always be printed on packaging.

My favourite bit of nonsense is signs for distance for walkers. Distances are usually in miles or fractions of miles but for indicating things really close by (e.g. toilets round the corner) we switch to metres.

I've found that it's becoming increasingly common to use metric for height and weight also - particularly with younger people etc.

I think we'll soon be left with the only remaining imperial bits being speed, long distances, and pints of beer - none of which seem likely to go away any time soon

There a few exceptions here and there, but the UK uses the metric system wherever it can, including speed limits in some locations.

Where does it use it for speed limits? All our cars have speedometers in mph. I’ve never seen a speed limit sign that uses kmph

I've seen an 8kph limit on inland waterways. But it was very unusual to see

Oh right, yeah. In canals it’s kmph.

The UK is (still) officially metric, just with a few exceptions - speed limits being one of them.

The US is also officially metric: https://en.wikipedia.org/wiki/Metrication_in_the_United_Stat...