45% of the non-Christian general public (i.e. the UK adult population minus active Protestant church goers) say they would be comfortable attending a normal Sunday service in a Protestant/evangelical church.
This is partly accounted for by the phenomenon of “the ‘church’ that doesn’t go to church.” As might be expected, this demographic – those who identify as Christian though are not active Protestant churchgoers – are most likely to say that they feel comfortable attending a regular (Protestant) church service. However, as the following chart shows, even among atheists/agnostics almost a third would feel comfortable in this environment and among those of other religions the result is almost the same as the national average (45/46%).
For more statistics and analysis of the UK mission context see: