Heat two of The Great Sport Relief Bake Off and four more well-known personalities throw their oven gloves into the ring for this charity special. Host Mel Giedroyc and judges Mary Berry and Paul Hollywood are joined by renowned choreographer and dancer Arlene Phillips, Radio Four's Fi Glover, The Apprentice runner-up and now presenter Saira Khan and art historian Gus Casely-Hayford. Who will sink and who will rise to win a place in the Great Sport Relief Bake Off final?