British Prime Minister David Cameron has extended a public apology to Queen Elizabeth II after he was caught on camera saying she "purred" at the results of the Scottish referendum.

The Prime Minister, who was in New York for a United Nations meeting, was recorded by Sky News telling the former Mayor of the city Michael Bloomberg that the Queen "purred down the line" when he announced that the Scottish people had voted to stay in the United Kingdom.

Prime Minister Cameron has told Andrew Marr on BBC 1 as well as the Daily Mail that he is "embarrassed" and "sorry" for having recounted the private conversation in public.  

"Look, I'm embarrassed by this. I'm extremely sorry about it. It was a private conversation, but clearly a private conversation that I shouldn't have had and won't have again," he wrote to the Daily Mail.

"[It is] one of those moments when you look back and kick yourself very hard," he told the BBC.

The comment by the Prime Minister breached a long standing code of conduct between the British government and the royal household and has led to a barrage of criticisms directed at the Prime Minister.

Mr. Cameron revealed that officials from his office have already been in contact with the Queen's retinue to register his apologies. He further noted that he will personally apologize to her.

Despite the hail of criticisms at the Prime Minister, some pundits say the Queen may have already betrayed her neutrality on the topic after she was reported saying the Scottish people should think carefully about the vote.

The actual comments the British Prime Minister Cameron said is that "The definition of relief is being the Prime Minister of the United Kingdom and ringing the Queen and saying: it's alright, it's OK."

He also talked playfully about suing polling companies for their reports which showed that the race between the "Yes" and "No" vote was very close.

"It wasn't [very close] in the end, but there was a time in the middle of the campaign when it felt...I've said I want to find these polling companies and I want to sue them for my stomach ulcers because of what they put me through, you know. It was very nervous," he said.