The celebrity bakers take on three challenges - brownies, a 3-D biscuit, and a technical challenge that is quite a handful.

The celebrity bakers tackle topped flapjacks for the signature challenge, a tricky technical, and make their 'happy places' out of meringue for the showstopper challenge.

Comedian Johnny Vegas, grime artist Big Narstie, Olympian Katarina Johnson-Thompson and Labour MP Jess Phillips handle shortbread for their signature challenge, get to grips with a picnic favourite for the technical, and re-create themselves in cake form as their showstopper.

Jeremy Paxman, Joe Wilkinson, Sally Lindsay, Georgia Toffolo are in the tent, baking characterful biscuits and 'hobby cakes' as one of them seeks to bag the coveted star baker apron.

The celebs tackle a fruity drizzle cake and a giant biscuit selfie.

The Bake Off for Stand Up To Cancer is back and first in the tent are Louis Theroux, Jenny Eclair, Russell Howard and Ovie Soko. Who will be star baker?

The celeb bakers tackle roulades for the signature, a tricky technical, and make their favourite place in the form of a cake for the showstopper.

The celeb bakers tackle classic eclairs for the signature and puff pastry for the technical, and recreate their biggest fears in a cake showstopper.

James Blunt, Alison Hammond, Alex Jones and Joe Sugg tackle decorated traybakes, a classic British staple and an impressive biscuit scene depicting what they wanted to be when they grew up.

Carol Vorderman, Kelly Brook, Rob Rinder and Mo Gilligan tackle a signature sandwich biscuit, a sweet bread-based technical and a cake showstopper revealing their favourite guilty pleasure.

Bake Off's back as Daisy Ridley, Rob Beckett, Alexandra Burke and Tom Allen make millionaire shortbread, a fruity tart and their pet hates in cake form.

James McAvoy, Anne-Marie, David Baddiel and Dame Kelly Holmes make signature decorative tarts and a savoury technical, and render their spirit animals in cake form in the showstopper.

Dizzee Rascal, Nick Grimshaw, Philippa Perry and Reece Shearsmith tackle vegetable slices, a royal technical and a 'selfie' made entirely from biscuit.

Stacey Dooley, Jade Thirlwall, KSI and Katherine Ryan make cocktail-flavoured fondant fancies and have their pastry skills tested, before creating a showstopping biscuit and meringue scene.

Anneka Rice, John Bishop, Nadine Coyle and Ade Adepitan tackle decorative choux buns and financiers before making a showstopping cake that represents something from their bucket list.

Emma Willis, Clara Amfo, Blake Harrison and Alex Horne take on decorated biscuits, madeleines and a showstopping choux sculpture which embodies their secret talent.

Ruby Wax, Gareth Malone, Laura Whitmore and Yung Filly make signature fruit turnovers and a chocolate fondant technical, and relive their most embarrassing moments in a meringue showstopper.

Matt Lucas dons an apron to bake alongside DJ Annie Mac, Ed Gamble and rapper Example as they tackle signature stained-glass biscuits, a jam-packed technical, and showstopping cakes that showcase what they did before they were famous.

Mo Farah, Motsi Mabuse, Katherine Kelly and Ben Miller tackle meringue roulades in the signature challenge, make traditional Italian biscuits in the technical, and render their favourite childhood memory in cake form in the showstopper.

The celebs tackle a savoury pie signature and fiddly French confection in the technical, before recreating their most embarrassing celebrity fail in meringue.

AJ Odudu, Gemma Collins, Jessica Hynes and Tim Key make sandwich cakes and a classic tart, before recreating their earliest childhood memory in choux.

Actor David Morrissey, comedian Lucy Beaumont, Olympic medal-winning diver Tom Daley and radio presenter and cancer survivor Adele Roberts attempt a savoury quiche signature, a technical teatime biscuit and a showstopping day off in cake form.

Paddy McGuinness, Coleen Nolan, Joe Thomas and Ellie Taylor make Jaffa cakes, take the rough with the smooth in the pastry technical, and render their home towns in biscuit for their showstoppers.

Deborah Meaden, Jay Blades, Judi Love and Mike Wozniak make signature cheesecakes, a vegan version of a BBQ classic for the technical, before recreating their first celebrity crush for their showstopper.

A new set of celebs enter the tent for SU2C. Jodie Whittaker, Paloma Faith, Munya Chawawa and Spencer Matthews make Prue and Paul in biscuit form.

Danny Dyer, Rhod Gilbert, Leigh Francis and Yinka Bokinn attempt miniature biscuit people in the Signature and a fancy tea-time classic in the Technical, before recreating their biggest failure in cake form for the Showstopper.

Oti Mabuse, Gabby Logan, David O'Doherty, Suzi Ruffell take on an ice cream roll Signature challenge and a kids' party favourite in the Technical, before creating their biggest fear in meringue form for the Showstopper.

Greg James, Fern Brady, Spice Girl Mel B and Dermot O'Leary take on iced buns in the Signature, a family classic in the Technical and a hilarious Showstopper, where they create their celebrity doppelganger in biscuit form.

Noel Fielding and Alison Hammond welcome Joe Locke, the Rev Richard Coles, Adam Hills and Sara Cox into the tent. Under the watchful eye of judges Paul Hollywood and Prue Leith, the contenders must take on Signature biscuit bars, grapple with pastry in the Technical, and recreate their famous best friend for their Showstopper.

A new batch of celebs enter the tent. It's spouse and sibling rivalry, as Chris and Rosie Ramsey and Scarlette and Stuart Douglas take on each other.

Roman Kemp, Amelia Dimoldenberg, Sarah Beeny and Maxine Peake take cupcakes to a new level and create memorable romantic dates in biscuit form.

Kate Garraway, Gbemisola Ikumelo, Phil Wang, and Sophie Willan will be taking on mini loaf cakes in the Signature and things get spicy in the Technical. In the Showstopper the celebrities reveal their hidden talent in choux.

In three challenges, set by Paul Hollywood and new judge Caroline Waldegrave, the bakers must make delicious crumpets in the Signature, not panic over perfect piping in the Technical and recreate their celebrity hero in pastry for their Showstopper.

The bakers take on a retro recipe for brandy snaps in the signature, try not to be too cheesy in the technical and reveal all with a 'my best kept secret' cake showstopper.