A new photograph of Prince George and Princess Charlotte volunteering in the rain has been released as the Queen praises Brits in a new message.

The monarch thanked the Britons who "give themselves so freely and selflessly.

The 94-year-old royal said: "As Volunteers’ Week draws to a close, it is inspiring to reflect on the many thousands of people, who through their acts of generosity and kindness, have achieved so much for the greater good.

“I have been following with interest how men and women from around the world, including my own family, have been helping and recognising the vital role of the volunteer.

“I send my best wishes to all those who give themselves so freely and selflessly in the service of others.”

Other senior royals have this week heralded the efforts of Britain’s army of heroes.

The Cambridges haven't let on if they're still home schooling
The Cambridges with the young royals (file photo)

Through the Royal Voluntary Service, the Duchess of Cornwall, the Duchess of Cambridge, the Countess of Wessex and the Duchess of Gloucester joined the ranks of NHS Volunteer Responders for regular ‘check in and chat’ calls.

They have been making regular calls to people self-isolating in the community, as part of the 250,000 tasks completed by NHS Volunteer Responders so far.

Prince William and wife Kate made video calls to several organisations including Conscious Youth, an organisation that works with young people from mainly black and other ethnic minority backgrounds in Huddersfield, Dewsbury, and other parts of Kirklees in West Yorkshire.

The Queen has issued a message for volunteers

William also revealed he has been secretly manning a helpline for people in crisis.

The Duke of Cambridge has joined more than 2,000 volunteers who have trained to help people using the UK’s first round-the-clock text messaging service, Shout 85258.

Kate has also been helping others and has taken part in "check in and chat" calls with those self-isolating or vulnerable as part of the Royal Voluntary Service's NHS Volunteer Responders scheme.

In addition to the Check in and Chat calls, the Cambridges and their family also visited the Sandringham Estate recently to pack up and deliver food parcels to isolated pensioners in the local area.

The Countess of Wessex has also been privately joining volunteering teams to support efforts in local communities, including once a week with Mealforce and Helpforce, helping to provide daily meals for NHS workers across London.

Sophie, 55, has also joined volunteers at other organisations and community initiatives including the Hope Hub in Camberley, Frimley Park Hospital, the Lighthouse Woking Foodbank and Nourish our Nurses.