BBC One

This one-off treat offers a unique look into charities that the Duke and Duchess of Cambridge support. Mary Berry accompanies them on four special visits. Throughout the programme Mary also cooks some of her favourite Christmas recipes for viewers to try out at home, as she helps prepare the festive food for a very royal event to thank all those working and volunteering over the Christmas period.

The Duchess of Cambridge and Mary travel to Liverpool to visit The Brink, the UK’s first dry bar set up by Action on Addiction to provide a safe space for people who are suffering from addiction.

The Duke of Cambridge and Mary visit The Passage, which is London’s largest resource centre for homeless and insecurely housed people. Along the way they meet the inspiring people whose lives have been changed by the help and support these charities provide, especially at Christmas time. Mary also joins the Duchess of Cambridge behind the scenes at RHS Wisley to learn more about the importance of the early years in raising the next generation of happy, healthy children.

This special programme culminates in a Christmas party, hosted by the duke and duchess and features some surprise guests, including Nadiya Hussain who helps Mary Berry with the festive food. The party is to thank and acknowledge staff and volunteers from charities and organisations who will be working tirelessly over the Christmas period. Mary has designed the Christmas menu, and the duke and duchess even get involved with some of the party prep.