In conclusion, I would like to make a few remarks about principle.
I have heard it argued that the Extraordinary Form is not part of the Anglican Patrimony. I find this difficult to understand, and, if you have read the first four parts of this piece, so will you. Of course, the Extraordinary Form was never officially authorised in the Church of England or the American and Australian branches of the Anglican Communion. But, then, neither was the Ordinary Form. Certainly, in England, the Anglo-Papalist movement which is our own much loved ecclesial background did use the Tridentine Rite, used it and loved it, and suffered persecution for that use and that love. The Missale Romanum was the gold standard, with the English Missal providing, over half a century, an intermediate stage in the journey towards its full adoption. That is the place we have come from.
In any case, the Magisterium has solved the matter. Anglicanorum coetibus makes clear (Paragraph III) that Ordinariate clergy may use the Roman Rite as well as using their own liturgical books, and the Apostolic Constitution makes no distinction here between the two forms of the Roman Rite which exist by law in the Latin Church. And Summorum Pontificum establishes that, in principle, every Catholic priest of the Latin rite may use the Extraordinary Form without permission either from the Apostolic See or from his Ordinary. To put the seal on it, the Ordinariate Order of Mass promulgated by Rome incorporates the Preparation, the Offertory Prayers, the Libera nos, the Last Gospel, from the Tridentine Rite. These things are seen by Rome as part of the Anglican Patrimony. Roma locuta est.
This series is now complete.