On the April 1st, 2022 installment of "The Lawfare" podcast, screenwriter Andrea Chalupa reports how during the course of filming "Mr. Jones", they reached out to the New York Times for permission to quote directly from Walter Duranty's article that denied a famine had taken place in Ukraine, but the Times refused to grant permission.
The pre-WWII London locations shown in the movie were actually shot in Edinburgh.
The version shown at the Berlin International Film Festival in 2019 ran for 141 minutes, but the version later released to the general public in 2020 only runs for 119 minutes. Exactly which scenes were removed (and why) has not been disclosed by the studio or the director, although the fact that several initial reviews noted the long running time is likely the reason.
When George Orwell is typing, he recites the line, "But some animals are more equal than others," which is from his novel "Animal Farm."
In the love scene between Mr. Jones and Ada Brooks, the NYT reporter, Caravan plays in the background, performed by the Soviet Army Jazz Orchestra. The recording is of course from much later than 1933, but the piece Caravan itself was written and first performed by Duke Ellington only in 1936.