THE Crown has sent royal fans in a frenzy with an explosive season 4.
The Netflix drama has returned to the streaming service, with the scene set in 1979, and new faces including Emma Corrin as Princess Diana and Gillian Anderson as Margaret Thatcher.
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Eagle-eyed The Crown fans glued to the dramatic action have spotted a series of historical inaccuracies, question marks and blunders.
Yet what are these - and where do they feature in The Crown season four?
Thatcher's tone
Former X Files actress Gillian Anderson has taken on the role of the UK's first female Prime Minister, Margaret Thatcher.
Yet some angry fans have suggested her gravelly accent is a "parody" and "caricature" of a much-older Maggie - in complete contrast to her feisty determined nature in 1979, when she was elected and when the series starts.
One took to Twitter to write: "I think Gillian Anderson is a wonderful actor. But I just don't understand the praise she is getting for her Thatcher.
"It's awful - she is copying the voice and intonation of her latter years, after office. There is none of the urgency and passion of Thatcher as PM #TheCrown."
Down Under Dilemma
Prince Charles and Princess Diana were accompanied by their young son, Prince William, on their 1983 tour to Australia and New Zealand.
The Royals made history by taking the nine month old tot on the trip - with a potential heir not usually travelling with the next in line to the throne.
Official royal photographs taken in New Zealand on Auckland’s Government House lawn on April 23, 1983 show Prince William, dressed in a lemon-coloured outfit, playing with his parents on a rug.
Yet the heartwarming family scene appears to have been re-located to Australia in The Crown's season four, with the outdoor playtime taking place in the outback instead.
Mountbatten Mystery
The opening episode of The Crown's season four shows a spat between Prince Charles and his great-uncle, Lord Mountbatten.
The pair have locked horns in a intense phone call over the Queen's son's relationship with the then-married, Camilla Parker Bowles.
Yet show writer Peter Morgan has admitted he fabricated the high octane scene.
He told The Times how their spat was simply "made up in my head."
Charteris lives on
Martin Charteris has featured on The Crown's first three seasons.
Actor Harry Hadden-Paton took on the role for seasons one and two, while Charles Edwards arrived in season three.
Fans have pointed out a potential plothole with series four dates and Charteris' role as the Queen's private secretary.
In real life, he retired from his role as Queen Elizabeth's close advisor in 1977, yet the latest series starts in 1979 - and sees his employment in full flow.
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The (wrong) show must go on
The glitz and glam of a royal outing to the London Victoria Palace, for the 1984 Royal Variety Performance, is detailed in season four.
A billboard prop outside the venue, installed for filming, reads: "In the presence of Her Majesty Queen Elizabeth II.
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"His Royal Highness The Duke of Edinburgh."
Yet in real life, the royal couple could not attend the show that year, instead sending Prince Charles and Princess Diana on their behalf.