There are opinion polls that are so striking they change history. Many Britons will remember the YouGov poll in September 2014. It was the first poll in the Scottish independence referendum campaign to show the Yes side ahead by 51 per cent to 49. That poll shocked SW1, panicked the Cameron government, and led to ‘The Vow’ – the last-minute promise of further devolution if Scotland stayed in the UK. And lo, ‘No’ scraped home, and Britain staggered on.

Then there are polls that go beyond striking into ‘whoah, can that possibly be true?’ territory. Polls so unexpected they feel world-changing. The same company, YouGov, has produced just such a poll. It shows that religious belief among 18 to 24-year-olds has tripled in just four years, from 16 per cent to 45 per cent.

Can that possibly be

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