When Jonathan and Joey visit Father Roderick Alberic in his workshop, he is seen trying his own coffin out for size. His hands alternate between being inside the coffin and gripping the sides.
When Hugo Dore picks up his copy of 'The Daughter of the Sphynx' from the bookshelf, he is holding a white cup in his right hand. When the camera angle changes, his is no longer holding the cup and has had no opportunity to put it down.
In the courtroom scene the judge uses a gavel. Gavels have no place British courts.
The Judas Tree of the title is identified by the vicar as the common Judas Tree of gardens by its botanical name Cercis siliquastrum but is actually shown to be a small-leaved lime (Tilia cordata).
During the vicars introductory scene in this episode, the long haired cat which that triggers his allergy is supposed to settle by the bird table. He is indeed seen to jump onto an adjacent picnic table. However, from the angle of his landing (coming down, rather than jumping up) it is obvious he was thrown by some off-screen crew member rather than coaxed up on cue of his own accord.
The year was revealed to be 1988 on the bottom of a drink can discarded by the girl driving the car, but when the camera returns to the inside of the car, the sound system was a modern late 2000's CD player.
Whilst trapped in the cellar Jonathan complains of being trapped with at least half a hundredweight of tree stumps. He would know that this is only about 25 kilos and the mass of the logs is far more.