At 1:12:27 there is the outdoor Eucharistic Procession. In normal usage, the canopy, called a Baldacchino, is used to protect the Eucharist. In the scene, the Baldacchino is covering the men, while the Eucharist, in the monstrance, is at the front as if it's leading a parade. There would also be incense used in adoration. There would never be drums.
Professor Pinnock refers to Inspector Lewis by the actor's name, Kevin, instead of the character's name, Robbie.