When the Queen gets in the Land Rover with Charles to go stalking (the stag) she loads up 2 black Labrador retrievers. When she stops the vehicle and says she'd rather walk back, she opens the door of the vehicle to take the dogs with her, and 3 black Labradors get out.
When the Queen drives into the river and the car gets stuck we see that on the other side of the river there is little to no road and lots of heather. When later there's a shot from above, the car is suddenly facing the side of the river where the road is clearly marked, and the heather covered bank is now behind the car.
In the first audience scene with Tony Blair, the Queen uses a bell (on the table next to where she was sitting) to let the footman know to usher in Mrs. Blair. In the final audience scene, the same table is bare. Frears and Morgan themselves point out this goof in their commentary on the DVD.
When the Queen takes a telephone call in the kitchen, you can clearly see three cucumbers next to her. After the camera changes position, there is only one.
In the scene before the Queen addresses England, she is advised to make the change "and as a grandmother." She writes the correction, clearly caps her pen and begins putting it back. In the very next shot, she caps the pen a second time.
While the Queen does drive herself on her lands, her security is always at a discreet distance; it is inconceivable that she would have to call for assistance, much less be allowed to be stranded like the average motorist.
Prince Phillip expresses disgust at "soap stars and homosexuals" attending Diana's funeral, and is sarcastic about Elton John playing in Westminster Abbey, while the Queen looks at him in shock. This is unlikely to be the case in reality, as the Queen Mother was well known to be supportive of gay people, and reportedly looked forward to John playing at the funeral, as she had requested him to play for her privately numerous times at her home.
When Princess Diana's coffin is being carried from the plane the pallbearers are all walking in step. In reality, and correctly, the bearers on either side were out of step so that their inside and outside legs were in sync, not, left and right. This stops the coffin from rocking from side to side.
When the Queen goes to see the trophy stag after it was shot only its head has been removed. A hunter would first have to field dress (gut) the animal where it lay and then immediately skin it once it was hanging. Also, the head was removed far too high up the neck; not enough of the cape was left for it to be mounted.
The first meeting between Blair and the Queen is fiction. A newly-elected PM is always fully briefed on protocol before meeting the Monarch.
When in the film they mention that the Union Jack is not flying at half mast, they should have said "Union Flag" as the Union Jack is the name of the flag on a boat or ship. However, the British flag is colloquially known as the Union Jack, so whilst its correct title is indeed the Union Flag, the vast majority of the population call it the Union Jack irrespective of where it is flown.
Several people in the film repeatedly refer to the practice of flying a flag at "half-mast" to honour someone recently deceased, in this case at Buckingham Palace. Although in the US the term used is "half-staff", in the UK it is correct to say "half-mast", whether the half-mast flag in question is on land or sea, according to the Flag Institute.
The Queen says that Tony Blair is her tenth prime minister, even though one of them, Harold Wilson, served two non-consecutive times during her reign. This is because she is referring to them as individuals (not in the same way U.S. Presidents are counted).
Helen Mirren's tattoo at the base of her left thumb is clearly visible when she is holding a newspaper. This can be verified in the IMDb photo gallery for 'The Queen'. Elizabeth II has no tattoos.
The Tuesday meeting in the Lord Chamberlain's office is at 10 am, and Blair's aide returns to say it lasted "two and a half hours". Yet, back at Balmoral, it is morning and everyone is preparing to leave to flush the buck when the faxed memorandum reporting on the results of the meeting arrives.
Numerous scenes show members of the royal family watching television coverage of Princess Diana's death, consisting mostly of steady head shots of people being interviewed or speaking to the camera. However, many of these scenes show bright, flashing, rapidly changing colors reflecting on their faces as they watch the screen.
When Prince Charles is exiting the plane the sound of the engines winding down is heard; however, the fans of both engines are shown to be stationary.
When Tony Blair is riding to the airport in the back of his Jaguar, the trees visible through the rear window are leafless, although at the time of the action - in very early September - they would still be green.
The ending takes place two months after the funeral of Princess Diana, i.e. early November. Nobody, however, is wearing a Remembrance Day poppy - unthinkable in the UK at that time of year.
When Tony Blair calls the Queen at Balmoral during tea time, when she picks up the phone he says "Good morning, Ma'am". Tea time is late afternoon, not morning.
At the end of August the heather on the hills of Scotland would be in full bloom, so it was obviously filmed earlier in the year.
When Tony Blair is riding to the airport in the back of his Jaguar, in the background you can see a Mercedes Benz S-class with an 02 number plate (ie March-August 2002). There also appears to be an out-of focus 52 plate (September 2002 - February 2003) later in the same scene. At this point in the film it is 1997.
In the first scene where Blair is talking to the Queen, when she puts down the phone he hears the old pulse dialing tone, this was phased out by BT, in London, long previous to 1997 when the film is set.
While in the back of his car, Tony Blair takes a call on his mobile phone from the Lord Chamberlain. Blair's handset is a Nokia 6210 which was not released until 2001 (four years after the film was set).
When Blair is in his study surrounded by books using a telephone, a copy of "Carter Beats the Devil" is visible which wasn't first published in Britain until 2001. The film is set in 1997.
In the scene in which the queen disables her Land Rover in the riverbed and is stranded, alone, when she opens the car door you can very clearly see in the window the reflection of a man looking on from the shore.
When the Queen goes to see the trophy stag, the groundskeeper who greets her addresses her as Ma'am (rhyming with "farm"), whereas earlier in the film Tony Blair is advised to call her "Mam" (rhyming with ham).