In Pictures:How to make perfect tea
Bottom down and bottoms up

The finished tea should be a "rich, attractive colour" and be somewhere in the region of 65 degrees centigrade any hotter and scientists warn that "vulgar slurping" might be required.

Dr Andrew Stapley says: "For best results carry a heavy bag of shopping or walk the dog in cold, driving rain for at least half an hour beforehand. This will make the tea taste out of this world."

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