David Cameron describes apology to the Queen after revealing their private conversation

File photo dated 11/5/2010 of Queen Elizabeth II greeting David Cameron at Buckingham Palace at an audience to invite him to be the next Prime Minister following the General Election. The Queen saw 13 Prime Ministers come and go during her reign - with Boris Johnson as the 14th. Issue date: Thursday September 8, 2022.
David Cameron has described his 'upfront and fulsome apology' to the Queen following his mishap in 2014. (PA) (PA)

David Cameron has described how he had to apologise to the Queen after revealing details of one of their private conversations.

Microphones picked up the then-prime minister recounting how the Queen “purred” down the telephone when he informed her of the result of the 2014 Scottish independence referendum.

Cameron told the BBC’s Sunday With Laura Kuenssberg programme: “It was a very upfront and fulsome apology done very quickly at the beginning of an audience. I think that is all I should say.

“From ever onwards I have been more careful when cameras and microphones are around and I have learned my lesson.”

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Asked if the Queen had told him off, Cameron replied: “Obviously everything said at those meetings is entirely private.”

Meanwhile, another former PM, Cameron's successor Theresa May, said she believes the monarchy will change gradually under King Charles.

May told the same programme: “If you look at the Royal Family, they have been steadily evolving a different approach, a different way of doing things over time, and I am sure King Charles will continue to take that forward.

File photo dated 19/04/2018 of Prime Minister Theresa May with Queen Elizabeth II at the formal opening of the Commonwealth Heads of Government Meeting in the ballroom at Buckingham Palace in London. The Queen died peacefully at Balmoral this afternoon, Buckingham Palace has announced. Issue date: Thursday September 8, 2022.
Theresa May with Queen Elizabeth II in 2018. (PA) (PA)

“Of course, he is a different person and he may want to change things in some ways but I think, critically, as the Queen did, any change in the way things are done would be done gradually and very carefully."

May, who on Friday drew laughter from the entire House of Commons with her anecdote about a cheese mishap at a picnic with Her Majesty, added: "I think [the public] will expect that sense of continuity, but also that sense that the world has been changing, continues to change, so a willingness to evolve alongside that."