http://times247.com/articles/study-number-of-british-converts-to-islam-on-rise
http://english.alarabiya.net/articles/2012/01/05/186544.html
A new study found that the number of Britons converting to Islam is growing, a London-based newspaper reported on Tuesday.
The Independent newspaper said that the estimated number of British converts has always been difficult to count because “census data does not differentiate between a religious person that has adopted a new faith or was born into it.”
According to a new study by the inter-faith think tank Faith Matters, the real figure could be as high as 100,000, with as many as 5,000 new conversions nationwide each year. Previous estimates have placed the number of Muslim converts in the UK at between 14,000 and 25,000.
The study used data from the Scottish 2001 census, the only survey to ask respondents what their religion was at birth as well as at the time of the survey; researchers broke down what proportion of Muslim converts there were by ethnicity and then extrapolated the figures for Britain as a whole, the newspaper said. In all they estimated that there were 60,699 converts living in Britain in 2001.