Introducing the service held at Westminster Abbey earlier this month, Kate will tell TV viewers: “The arrival of every baby is a precious and momentous time, it brings us together to reflect on new beginnings and brings hope for the future.

“Throughout our earliest interactions, relationships and experiences, with those who love us, even before we are born, we lay the
foundations to so much of what that future will depend on.

“But only by valuing and supporting the vital role of the adults in a child’s world can we hope to make a difference.”

She was joined at the carol service by husband William and their children Prince George, 10, Princess Charlotte, eight, and Prince Louis, five. Among the 1,500 guests were midwives, nursery teachers and baby bank volunteers.

Kate has made early childhood development a main focus after she launched the Shaping Us campaign in January.

She added: “Tonight’s guests have been invited in recognition of their support of our youngest children as we shine a spotlight on the critical role they play in nurturing and raising the future generation.

“From parents and carers, to early educators, midwives, health visitors and community volunteers, thank you for all you do in helping the very youngest members of our
communities, feel safe, valued and loved.” The programme will feature
contributions from celebrities such as Rio and Kate Ferdinand plus Dame Sheila Hancock.

The highlight of the show is a poignant musical tribute to the late music legends John Lennon and George Michael.

Jacob Collier, inset, played Wham!’s hit Last Christmas on Lennon’s piano, which was later owned by Michael.

Broadcaster Roman Kemp, the son of former Wham! backing singer Shirlie Kemp, introduced Collier and talked about the role Michael, who was his godfather, played in his life.

During the concert, Oscar winner Jim Broadbent read an extract from Letters From Father Christmas by Lord Of The Rings author JRR Tolkien while singers Beverley Knight and Adam Lambert performed.

● Royal Carols: Together At Christmas, ITV1, 7.45pm, Christmas Eve and then ITVX.