Noel Fielding and Sandi Toksvig host a special celebrity edition featuring the cast of Derry Girls for the second of this year's Christmas specials. Saoirse-Monica Jackson, Nicola Coughlan, Jamie-Lee O'Donnell, Dylan Llewellyn and Siobhan McSweeney will be cooking up some New Year-inspired bakes to impress judges Prue Leith and Paul Hollywood and be crowned Star Baker. With music from the London Gospel Community Choir