A Matrix Chambers member with time on his hands, now there's a surprise. Still, no harm in getting some opinion, drafted in an idle moment, into the Mail. That it contains a solicitor's point or two shouldn't stop you if it's good for debate and business.
So the C of E in any parish has to marry anyone resident in that parish ? True. And when that was ecclesiastical or statute law, how was marriage defined , what was contemplated? And if, post hoc, Parliament changes the definition, how is the rule established for a different one abrogated? Not at all. And how then does this fall to be against human rights read as a whole? Not at all.