The survey of 20,062 people was commissioned by former British Conservative party deputy chairman Lord Ashcroft.

Titled " Small island: Public opinion and the politics of Immigration, ” the poll included a question asking, " To which of the following religious groups do you consider yourself to be a member of? "

According to a press release on the National Secular Society website on Tuesday, some 36 percent of those surveyed across all age categories had no religion while 55 percent said they were Christian and 3 percent described themselves as Muslim.

Meanwhile, in the 18-24 age group, 46 percent said they had no religion while 33 said they were Christian and 11 percent identified themselves as Muslim.

" The large number of young people identifying as Muslims - much larger than previous generations - suggests that Islam will soon be a much more significant force in this country than it is at the moment, " said Terry Sanderson, President of the National Secular Society.

Earlier in May, an analysis of the 2011 census suggested that Islam could overtake Christianity as the dominant religion in Britain in ten years for first time.

According to the report published by the Office for National Statistics (ONS), the number of people following the Christian faith in the UK has fallen from 71.7 percent in 2001 to 59.3 percent in 2011.