When King Henry visits Thomas More's house and steps off the boat, he steps into mud and makes light of it. When his retinue follow, it is seen their feet and leggings are already muddy from a previous take.
When Henry VIII's court enters Sir Thomas' yard, their feet are no longer muddy after the previous shot showed them getting muddy.
When Henry says curtly that it is 8 o'clock and he must be getting back to Richmond, the shadows are very short, indicating it really is about 1:00 p.m. The next moment, when Moore's wife complains to her husband, "You crossed him!", the shadows are long, indicating it must be evening.
(at around 1h 57 mins) During the trial of More, the guards at the back of the room turn around to face the roused crowd; they are facing forward again when the Chief Justice speaks, and facing the rear immediately after, with no time in which to turn.
In the beginning, when the messenger is being rowed to Thomas More's house, the sun is setting in the sky, and it is obvious that daylight is fading. When the messenger arrives at More's house, the daylight is no longer fading and, instead, the brightness of the day indicates early afternoon or even morning.
Lord Chancellor Wolsey did not die in office; he was removed from the office of Lord Chancellor by Henry (because of his displeasure at Wolsey's failure to secure a divorce from Catherine), and died more than a year after Sir Thomas More became Lord Chancellor. Wolsey did, however, remain Archbishop of York.
Wolsey says it is known that Catherine (of Aragon) was barren, or infertile. In fact, by this point, she had given birth several times, including to the future Mary Tudor, Queen of England, though there were no other surviving children.
In the film, More is depicted as clean-shaven at his trial. The real More had a long graying beard he grew during his imprisonment in the Tower of London.
The "silver" goblet floats when More throws it into the river. The cup and the base are hollow which causes it to float.
As the King arrives for a visit to the More household, inside the dining room the Duke of Norfolk sniffs a large salmon sitting on a serving plate on the table, ready for the guests to eat, and remarks approvingly, "Mmm, that's very well!'. However, the fish shows no signs of cooking and is obviously raw.
When Henry leaves More's estate, he twice indicates that it is eight o'clock. The shadows of most characters between his announcement and actual leaving are very short making it appear to be much closer to noon.
Night time scenes were sometimes filmed using a filter to darken scenes. BUT this technique left the sky blue when in fact the night sky is always black.
When Sir Thomas More enters the room to first answer charges before Secretary Cromwell, a chandelier with electric lights is visible in the background.
At the end, Thomas More picks the blossom of a tree called Aesculus hippocastanum L., a tree that appeared in Europe only in the 17th century and was introduced by the Turks.
When the King first visits More's house, a yellow Labrador Retriever runs to the house. However, the dog with the specific physical characteristics associated with Labradors today (which was shown) hadn't yet been bred.
More's daughter, Margaret, is wearing a very 1960s pinkish lipstick throughout the film.
Thomas More makes a reference to bulldogs (this being in the early 1530s). The term "bulldog" wasn't coined until a century later, in 1631 or 1632.
After Rich says, "Sir Thomas, if only you knew how much, much rather I'd your help than his", More's lips move immediately in response but without sound.