It is clear from their recent meeting that the Archbishop of Canterbury and Pope Francis have a warm personal relationship. It is equally clear that the Anglican Communion led by Archbishop Justin Welby and the Roman Catholic Church led by Pope Francis have much more in common than divides them – common strengths, common problems, even to a large extent a common vision. These are solid foundations on which to build. But the construction site has seen too little activity in the recent months or years. There is a limit to how long the two Churches can go on celebrating what has already been achieved, remarkable though it is.   The previous vision of church unity, of different Christian denominations merging into one, may never have been very realistic but it was imaginable. Peopl