The Great British Bake Off will be a bit shorter than you are used to this week 👀🍰Sign up to our daily Harrogate Advertiser Today newsletter Sign up Thank you for signing up! The Great British Bake Off is heading ‘back to school’. Channel 4 will be ringing the school bell as the bakers return to the Great British Bake Off tent. Channel 4 is once again the home of The Great British Bake Off, as it has been since series eight. Since its move to Channel 4, episodes of The Great British Bake Off have lasted for 90 minutes including adverts.