Ah. When I was a kid, the milk bottles had colour-coded foil tops. Gold was full-cream, silver was normal, and then there was blue and red. One of them was for skimmed, one for semi-skimmed. I don't remember which was which.
Occasionally, birds would peck through the foil top if you didn't bring the milk in first thing in the morning.
Nowadays, the cartons in the supermarket just say "skimmed" and "semi-skimmed". I don't recall what the full-fat ones are called these days.
I've no idea what the fat percentages are.
Roger - not necessarily speaking for empeg
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roger