Continuity mistake: On the morning of King George VI's death, the King's valet is in the dumbwaiter lift bringing up the King's tea and breakfast. Inside the lift shows the valet pulling the rope as it raises to the King's sleeping floor. The waiters are facing front and away from the valet, and the covered wall light is located closest to the main door with the rope in the left-rear corner. As the lift stops, the waiters are now facing the valet to the left, and the covered wall light is now located closest to the rear of the lift with the main rope now located in the left-front corner. These two scenes were filmed in two separate sets. (00:23:05)
Continuity mistake: As Philip paints his parrot, its head can be seen half-painted. When Parker enters the room and the camera switches focus to him, the head can be seen in the background fully-painted. However, when the camera returns to Philip, the parrot's head is again only half-painted. (00:24:42)
Continuity mistake: Margaret Thatcher tells the Queen that her son Mark has gone missing during the Dakar Rally. Mark's team hadn't been heard from in two days. Apparently in the evening of the same day the Queen and Prince Philip sit together and watch the news. You can hear the voice of the TV-commentator: "Mark Thatcher is missing for five days." And then the Queen tells Philip "The prime minister said something interesting today." So, what's right? 2 days or 5 days? (00:03:30 - 00:05:00)
Factual error: Once the Queen has given Mr. Churchill his "dressing down", he simply turns to leave the room. However, he had not been dismissed. The Queen always pushes a button positioned on a side table to call her equerry who enters the room to escort guests out. With Mr. Churchill, she did not request her equerry. (00:54:00)
Factual error: During the intro, the pilot is talking to a British Air Traffic Controller (ATC) as he's lining up his aircraft for landing at Benson (RAF Airport) in South Oxfordshire, England. The pilot reports "We're passing through flight level one-seven, for 2,500." Flight Level (FL) one-seven is 1,700 feet. In English (no pun intended), the pilot is saying he is passing through altitude 1,700 feet to his desired altitude of 2,500 feet. This may make sense if they were increasing their altitude, but since the pilot is preparing to land, it doesn't. (00:00:25)
Factual error: When the Queen is informed by telephone that Winston Churchill has died it is after a family birthday celebration meal for her Uncle Prince Henry. Everyone is in formal attire or black tie, meaning the party was an evening one. Light is visible through the windows in both the dining room and drawing room where the queen takes the phone call. Prince Henry's birthday does coincide with the date of Winston's death, in late January. At this time of year in London the sun sets very early, around 4:30pm. The family dinner would have taken place when it was dark out. (00:25:10)
Factual error: In the final scene Lady Diana is being pursued by photographers during the time of her courtship with Prince Charles. The most prominent car in the scene has an 'X' registration plate. The registration letter 'X' was only used from August 1981 onwards - after the wedding of Charles and Diana.