The number of people who say they have no religion is rapidly escalating and significantly outweighs the Christian population in England and Wales, according to new analysis.

The proportion of the population who identify as having no religion – referred to as “nones” – reached 48.5% in 2014, almost double the figure of 25% in the 2011 census. Those who define themselves as Christian – Anglicans, Catholics and other denominations – made up 43.8% of the population.

“The striking thing is the clear sense of the growth of ‘no religion’ as a proportion of the population,” said Stephen Bullivant, senior lecturer in theology and ethics at St Mary’s Catholic University in Twickenham, who analysed data collected through British Social Attitudes surveys over three decades.

“The main driver is people who were brought up with some religion now saying they have no religion. What we’re seeing is an acceleration in the numbers of people not only not practising their faith on a regular basis, but not even ticking the box. The reason for that is the big question in the sociology of religion.”

The report did not examine data from Scotland or Northern Ireland. Last month a Scottish Social Attitudes survey found that 52% of the population said they were not religious, compared with 40% in 1999.

In Northern Ireland, which has long been the most religious part of the UK, 7% said in the 2011 census that they belonged to a non-Christian religion or no religion.

The new analysis will fuel concern among Christian leaders about growing indifference to organised religion. This year the Church of England said it expected attendance to continue to fall for another 30 years as its congregations age and the millennial generation spurns the institutions of faith.

According to Bullivant’s report, Contemporary Catholicism in England and Wales – which will be launched at the House of Commons on Tuesday, both the Anglican and Catholic churches are struggling to retain people brought up as Christians.

Four out 10 adults who were raised as Anglicans define themselves as having no religion, and almost as many “cradle Catholics” have abandoned their family faith to become “nones”.

Neither church is bringing in fresh blood through conversions. Anglicans lose 12 followers for every person they recruit, and Catholics 10.

The vast majority of converts come from other Christian denominations, rather than non-Christians or people with no religion. “There’s a kind of denominational musical chairs,” said Bullivant. “No one is making serious inroads into the non-Christian population.”

The proportion of the population who describe themselves as Anglican plunged from 44.5% in 1983 to 19% in 2014. Catholics made up 8.3%, other Christians 15.7% and non-Christian religions 7.7%.

(The Guardian)