Kate and Camilla team up for an important cause

Four royal women have teamed up for an important cause which has seen them checking in with vulnerable and elderly Brits who have been forced to isolate in exceptional circumstances during the coronavirus crisis.

Kate, the Duchess of Cambridge has teamed up with the Duchess of Cornwall, the Countess of Wessex and the Duchess of Gloucester, joining the NHS Volunteer Responders program, coordinated by the Royal Voluntary (RVS), which checks in with people via video and phone calls.

The royals joined the program as part of National Volunteers Week which runs from the 1-7 June.

The Duchess of Cambridge, 38, called Donna Williams, 42, who has two children, one of whom, Alessandra, has a rare form of Type 1 Diabetes.

Camilla, the Duchess of Cornwall, 71, spoke with Doris Winfield who is 85 and has been forced to isolate alone.

Camilla, who is president of the Royal Voluntary Service (RVS), also thanked those who have given their time during the coronavirus pandemic at the start of what is usually Volunteers' Week.

She said: "This year in particular we owe a great debt of thanks to all our wonderful volunteers who have stepped forward in astonishing numbers, pulling together to support those affected by Covid-19."

Doris Winfield said having a chat to the Duchess meant the "world to me".

"I've been incredibly lonely over the last couple of months and it was wonderful to talk to her," she said.

"We talked about life in isolation and shared hobbies. She was very interested in my family and how I was coping. It really cheered me up."

Harry Deboo, 89, spoke with Sophie, the Countess of Wessex. Deboo lost his wife three years ago and he underwent a triple by-pass. He said speaking to the Countess of Wessex "made my week".

"It was great to chat to the Countess of Wessex and really made my week," he said. "I have one son who doesn't live locally – so I don't get to see many people – especially now. I also like to keep the memory of my wife alive and it was great to chat about her.

RELATED: Victoria Arbiter: Prince William and Kate's back-to-school dilemma

"She really listened to every word and it was great to share our lockdown experiences together!"

Birgitte, the Duchess of Gloucester, spoke with Beverly Webb, 82, who is alone and missing social interaction.

The British royal family has stepped up during the coronavirus crisis, adjusting to working from home and regularly reaching out to volunteers and healthcare workers, in particular the Duke and Duchess of Cambridge who have been actively reaching out to healthcare workers throughout the global pandemic.

Kate also launched a photo campaign called 'Hold Still', encouraging Brits to submit photos of themselves in isolation, the royal even taking the time to comment on her favourite submissions, the best of which will be displayed in a virtual exhibition later this year.