England should agree to the proposed change, to take effect immediately upon Saudi Arabia and Iran granting (and actually implementing) the same status to Christians, or hell freezing over, whichever occurs first!
In our library my wife has a book by the first (and thus far only) Iranian Anglican Bishop of Iran, "The Hard Awakening" by M.B. Dehqani-Tafti, a autobiography of his term as bishop from 1961 until the revolution. (The title is from a poem by the delightful, IMHO, and celebrated Persian poet Hafiz.)
My wife (who lived in Iran for a time) has shown me pictures of some Iranian Christian churches -- nothing like you'd see in England, but exquisitely beautiful.
Which does not speak to your issue -- but there were (once? maybe still are) Anglican Iranians.