Can anyone confirm that this is true?
Apparently 57% of 20's who attend church do so in London.
London has 11 per cent of all churches in England, and 20 per cent of all churchgoers. It has 53 per cent of all English Pentecostalists, and 27 per cent of all Charismatic Evangelicals. Also, it caters for 57 per cent of all worshippers in their 20s. "I couldn't believe that figure myself, and had to check it again," said Peter Brierley, the director of Christian Research" (Church Times 2005)
London has 13% of the general population by my rudimentary calculations.