The guidance said: “You can report a scam on the Action Fraud website here or by calling 0800 123 2040.”

Last year when the scam was at its height, Pauline Smith, head of Action Fraud, said: “We are asking the public to remain vigilant and be cautious of any automated calls they receive mentioning their National Insurance number becoming compromised.

“It’s important to remember if you’re contacted out of the blue by someone asking for your personal or financial details, this could be a scam.

“Even confirming personal details, such as your email address, date of birth or mother’s maiden name, can be used by criminals to commit fraud. If you have any doubts about what is being asked of you, hang up the phone. No legitimate organisation will rush or pressure you.”