The monarch, 94, has previously opted for an old-fashioned telephone rather than a conference call, but for carers week embraced the power of modern technology, using the name “Windsor UK.”

She spent 20 minutes listening to Alex, Amna, Mary and Nadia talk about the struggles of looking after family members during the pandemic.

Elizabeth said: “Interesting listening to all your tales and stories. I’m very impressed by what you have achieved already. I’m very glad to have been able to join you today.”

The conversation took place on June 4 but was only released today to promote carers week.

One of the women told the queen how she had been looking after a loved one since the age of eight but did not even realize she was a carer until she was 11 or 12.

Elizabeth was joined on the call by her daughter, Princess Anne, who said: “If you are an unpaid family carer, thank you so much for everything you do for those who cannot care for themselves.

“This Carers Week, and always, please know that your role is a vital one; one to be highlighted and celebrated, and one that should never be forgotten.”

The queen is currently locked down in Windsor Castle with husband Prince Philip as they attempt to stay clear of coronavirus.

Yesterday they marked the Duke of Edinburgh’s 99th birthday in private and this weekend was supposed to be Elizabeth’s official birthday parade, Trooping the Colour.

Instead, she will have a scaled down version performed by soldiers from 1st Battalion Welsh Guards, who have been on duty at the castle anyway.

A band of the Household Division of the British Army will play during the ceremony on Saturday.

A spokesperson for Buckingham Palace said: “There are approximately 7 million unpaid carers in the UK, and with vulnerable members of society currently shielding at home, many carers have taken on new responsibilities.

“The Queen and The Princess Royal heard from Alex, Amna, Mary and Nadia, who are all the primary carers for family members, about the different roles that carers have to play, and the challenge of juggling their own physical and mental health with that of their loved ones.

“The theme of this year’s Carers Week is ‘Making Caring Visible,’ and The Queen and The Princess Royal also spoke to Carers Trust’s Chief Executive, Gareth Howells, about the importance of recognizing and supporting unpaid carers, and highlighting the avenues through which help can be found.”