A rejection of the proposals could make it practically impossible for them to proceed.

The Church of England is not the only major Christian communion confronting major tensions on the issue, with the Catholic Church also plagued by divisions.

Pope Francis has stirred controversy with his relatively liberal attitude towards sexual orientation, which is at odds with the beliefs of many Catholic conservatives.

But the pope has also frustrated modernisers by sticking firmly to Catholic teaching that marriage is the union between a man and a woman.

AFP