The Right Reverend Michael Perham had wanted to visit the city's partner dioceses in Dornakal and Karnataka Central.
He had a tourist visa, which the Indian High Commission said was insufficient for "work" purposes.
A commission spokesman in London, said: "On a tourist visa he should not and must not preach."
full article from BBC
After having read this article over, it turns out it is NOT in reference to India's anti-proselytization laws.
It's actually far far cornier.
If I am to understand this correctly, since the Reverend is a Bishop, his "work" is ministry, and going to India to preach would be therefore work and not tourism. However, if I, a layperson were to go preach in India on a tourist visa..it's OK because my "work" is something different. Gotcha!