The British constitution is a curious beast. It can lie slumbering for many years and then suddenly change quite radically. We have seen this happen for example with reforms such as votes for women and the devolution of power to Scotland, Wales and London. What had seemed fixed and permanent turned out not to be so after all.
We may be slowly moving towards such a turning point with the current situation in the Church of England (CofE). Last week the church voted not to allow women bishops. There has been lots of sound and fury from members of the church themselves (64 per cent of the electoral college actually wanted change but they needed a two-thirds majority) and inevitably politicians of all sides even from those MPs who you would ordinarily expect to defend it.