The third and final heat in this Great Sport Relief Bake Off, a charity special hosted by Mel Giedroyc. The final four personalities take on more Bake Off challenges in hope of getting the last place in the grand final. Stepping up to the hotplate to have their baking scrutinized are TV presenter Anita Rani, singer turned fashion designer Pearl Lowe, BBC weatherman Alex Deakin and TV historian and archaeologist Alex Langlands.