It is a matter of great satisfaction to all right-thinking people that the English RC Church is increasingly recovering the extra-liturgical use of the Blessed Sacrament in Benediction and Exposition. I hope mention of one detail will not seem grudging.
I have seen Benediction which is interrupted after O Salutaris for a sermon. To my Anglican-trained temperament, it seems highly inappropriate that the Blessed Sacrament, exposed in the monstrance, should be unregarded while the congregation sits down and attends to a homilist. O'Connell shares my instinct; sermons, he tells us, are discouraged during the Quarant'Ore although they may be tolerated if they are about the Eucharist. And he emphasises that it is unseemly for people to turn their backs on the Sacrament.
The old Anglo-Catholic practice was Evensong, Sermon, and Benediction. If it is desired to have a sermon at Benediction on its own, would it not be best to have it before the Sacrament is exposed? And, to give proper dignity to the Proclaimed Word, could not a passage of Scripture be read before the homily? Preceded, perhaps, by In nomine ... and Dominus vobiscum?