Church attendance in Britain is declining so fast that the number of regular churchgoers will be fewer than those attending mosques within a generation, research published today suggests.

The fall - from the four million people who attend church at least once a month today - means that the Church of England, Catholicism and other denominations will become financially unviable. A lack of funds from the collection plate to support the Christian infrastructure, including church upkeep and ministers’ pay and pensions, will force church closures as ageing congregations die.

In contrast, the number of actively religious Muslims will have increased from about one million today to 1.96 million in 2035.