People may turn to Covid tests less regularly once charges come in from April. When is the optimal time to use one?

For months many of us have used a single red line in a plastic cartridge as a kind of social traffic light – swaying whether go out or stay at home to protect others from Covid. But from 1 April, lateral flow tests (LFTs) for those not showing symptoms will cease to be free of charge in England, and from 18 April in Scotland, meaning people will want to use them as economically as possible (if they bother testing at all). Wales and Northern Ireland are implementing a phased approach to charging for tests.

So, when is the optimal time to test if LFTs are limited and you want the greatest chance of knowing if you’re infected?

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Source: The Guardian