In the opening scene, the local Policeman says he has heard that work at the Manor has been stopped, but he would already know that, because he was with Mrs Bellamy when she stopped it, and backed her up in "A Law for the Rich".
Oz claims that the trout can't hear him - this in fact untrue. Also he tickles them in the middle of the stream, and walks up to them, which would scare them away. Real trout tickling or "guddling" is done over the side of a riverbank, and it would be nearly impossible to catch them the way Oz does here.
For some reason, when Bomber is in the toilet of the Barley Mow, the door is open and slightly ajar.
The camera man can be seen reflected on Carol's car boot, when she speaks to Wayne.
When Barry decides to go for a drive, he opens his van door and the cameraman is reflected.
When Oz flees from the gamekeeper, he opens Barry's van door and the cameraman is reflected.