The Church of England is in no position to object to secular marriages. Up until the early 19th century, the State required ALL legal marriages in England and Wales to take place in the Church of England and to be registered by the Church of England which was, in effect, a branch of the State. They lost their monopoly when civil registration was introduced in 1837. They are not going to get it back.
What about the Cathoilics and non conformists- couldn't they get legally married before 1837?