The ONC Tells It Like It Is.

'Nearly nine in ten over-65s are Christian. But even in the least  religious age group, 25 to 34-year-olds, more than half – 55 per cent – profess Christianity.Fifty-nine per cent of 16 to 24-year-olds and 60 per cent of under-16s said they were Christian.
Support for other religions breaks down as 4.4 per cent Muslim, 1.3 per cent Hindu, 0.7 per cent Sikh, 0.4 per cent Buddhist, 0.4 per cent Jewish, and 1.1 per cent who say they follow other religions.
Only 23 per cent of the population said they had no religion. Christian groups said the findings showed that State agencies which act as if Christianity was a minority hobby are wildly wrong.' Mail.