SIR – As a churchwarden for 16 years, and with 20 years’ experience as an immigration judge, I would like to offer my thoughts regarding the granting of asylum on the basis of “conversion” to Christianity (report, February 5). My experience of hearing appeals was that the process of assessing whether conversion had truly taken place was not only extraordinarily difficult, but also wide open to abuse. Any testing on the basis of knowledge of the Bible or of Christian teaching would be open to cri