In the scene where Burton and Taylor are filming a scene for The VIP's, an old style cash register is shown between them with an amount of 50p. The VIP's was filmed in 1964 but the decimal monetary system in the UK was not introduced until 15 February 1971. The cash register should have shown pre-decimal amount in pounds, shillings and pence.
When Richard leaves Liz at the hotel and drives home to ask his wife for a divorce, we see him racing down the road in a Jaguar XK E type. However moments later he rolls into his driveway in an Austin Healy roadster.
Richard Burton was almost never called "Dick" by anyone - he had an intense dislike of this diminutive and never hesitated to let people know that. Close friends and relatives usually called him "Rich", in the Welsh manner, or simply "Richard", a formality he preferred. He often said that the only people who called him "Dick" were journalists pretending familiarity with him.
Burton and Taylor apparently meet for first time moments before they shoot their first scene in full costume, suggesting they have never met, posed for publicity pictures or even rehearsed previously. In reality, both were at studio in Italy concurrently several months prior and certainly were introduced.
While listening to a live radio broadcast of the 1967 Oscars awards the year Taylor and Burton were nominated for Who's Afraid Of Virginia Woolf?, a woman announces Elizabeth Taylor as Best Actress, followed by a man who announces Best Actor as Paul Scofield. In reality, the Best Actor winner was announced first--by previous year's Best Actress winner Julie Christie, while Taylor's victory was announced immediately afterward by previous year's Best Oscar nominee Lee Marvin.
Although accurately reflecting the bare staging of Sir John Gielgud's production of "Hamlet" on Broadway in 1964, the production appears to end on Hamlet's last line and not the last line of the play and show only six actors at the first curtain call. IBDB list over twenty-five actors in the production.