Really? What happened to the oppressive theocratic tyranny of the Bishops?
With regard to opposite-sex marriage specifically or rather religious provisions thereof, that came to an end on January 1st 1837 with the introduction of secular civil marriage as per the Marriages Act 1836. The fact that a couple can get married with no religious element or trappings is all down to that.
They still try to stick their oar in given half a chance, though, even now. As with marriage equality, for example, which despite their beloved quadruple lock they wanted to prohibit even though it referred only to civil marriages and was thus none of their business.