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.
“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."