The Queen has been filmed on camera saying that Chinese officials were “very rude”.
Her Majesty makes the reference in relation to last year’s Chinese state visit in which the Chinese President, Xi Jingping, visited the UK.
The footage was taken at a garden party on Tuesday at Buckingham Palace, where the 90-year-old was talking to a police officer about the treatment of the British Ambassador.
Buckingham Palace said in a statement: “We do not comment on the Queen’s private conversations.
“However, the Chinese State Visit was extremely successful and all parties worked closely to ensure it proceeded smoothly.”
The Queen was speaking to Metropolitan Police Commander Lucy D’Orsi, who oversaw security during President Xi’s state visit last year.
Commander D’Orsi had been “seriously, seriously undermined by the Chinese, but she managed to hold her own and remain in command”, an official told The Queen.
Commander D’Orsi told the Her Majesty: “I was the Gold Commander so I’m not sure whether you knew, but it was quite a testing time for…”
“I did,” the Queen replies.
Commander D’Orsi later went on to say: “It was at the point they walked out of Lancaster House and told me that the trip was off, that I felt…”
The Queen then said: “They were very rude to the ambassador.”
Commander D’Orsi replied: “It was very rude and undiplomatic”, something Her Majesty described as “extraordinary”.
The footage was caught on camera as garden parties are filmed by the a single cameraman who supplies footage to all major UK broadcasters.
The incident comes just a day after UK Prime Minister described Nigeria and Afghanistan as “fantastically corrupt” whilst in conversation with The Queen.
This footage was also captured by the royal cameraman and caused lots of controversy.
The timing of Mr Cameron’s comments is particularly embarrassing, as he will host world and business leaders at the corruption summit on Thursday where Afghan President Ashraf Ghani and Nigerian President Muhammadu Buhari will be present.
A Downing Street spokesperson later said that the Presidents of Nigeria and Afghanistan have both acknowledged the corruption challenge, and that the UK stands shoulder to shoulder with them.