More than two-thirds of Brits do not believe the biblical story of Christ's birth, a survey has found.

Young people were particularly doubtful about the Nativity, with 78% of 16-24-year-olds saying they were not convinced of the historical reliability of the account.

Overall, 70% were sceptical of the baby's birth in a manger to a virgin mother, according to the poll of 1,000 people.

The misgivings also extended to people of faith. About a quarter of self-described Christians admitted they did not believe certain aspects of the Bible's teaching about Jesus, the survey by the British Marketing Research Bureau found.

A total of 22% doubted Jesus was both God and man, a view shared by 28% of the public at large.

The online poll commissioned by St Helen's Church in Bishopsgate, London, included 43% who called themselves Christian, 6% who belonged to another religion and 46% who claimed not to be religious.

The Rev Charlie Skrine, curate at St Helen's Church, said: "The survey we commissioned and the people we interviewed for the film agree: most of the UK believes that the accounts of Jesus's birth aren't good history.

"Combined with a general lack of understanding about the real meaning of Christmas, this leaves people without the hope that Jesus offers.

"This year, as a church, we wanted to raise awareness about the true meaning of Christmas - that God became a human being to make himself known to us and eventually to die on a cross to bring forgiveness of our sins."

According to New Testament expert and author Dr Paul Barnett, the "broad outlines of the origins of Christianity" were confirmed by historical sources.

"Using routine historical analysis, we conclude that the outlines of Jesus' life, teaching, death and resurrection as we find them in the gospels are historically reliable," he said.

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