In this special Christmas edition, children from local schools will be singing a carol live in studio and the final light on Blue Peter's famous Advent crown will be lit.

The cast of Chitty Chitty Bang Bang will perform a musical number, and Barney and Radzi will learn all about everyone's favourite festive vegetable… sprouts. They will learn about why we eat them at Christmas, how they are grown and harvested - and will face a sprout-picking challenge.