In a first-ever twist, hosts Alison Hammond and Noel Fielding welcome pairs of seasoned bakers into the tent, inviting them to battle it out for the coveted new year's cake stand. In the Signature, the duos create fantastic festive pies. The action heats up as the bakers pass the baton in a tricky Technical relay. Finally, in the Showstopper, each duo bring their favourite festive movie to life in biscuit form. As ever, Paul Hollywood and Prue Leith judge the contenders' offerings