Irish comedian Ed Byrne takes on the role as Bake Off host as ex-Spice Girl Geri Horner, BBC World Affairs editor John Simpson, footballer and pundit Jermaine Jenas and 90s pop star Louise Redknapp face three baking-related tasks set by judges Paul Hollywood and Mary Berry. For the signature challenge, they must make savoury tarts, before taking on Mary's chocolate and beetroot tray bake in the technical. Finally, the celebrities must use their imagination as they attempt to create 3D models of their favourite sporting moments using biscuits... sounds complicated, yet delicious.