Signature Challenge: Upside-down Cake. Showstopper Challenge: A cake, when sliced reveals a hidden design. Technical Challenge: Rum Babas.

Signature Challenge: 24 Flatbreads. Showstopper Challenge: 12 sweet and 12 savoury Bagels. Technical Challenge: Eight-strand plaited loaf.

The bakers are challenged to make two types of sponge puddings, take on a difficult Mary Berry recipe, and deliver a showstopping strudel.

The bakers seeking a place in the final have to frantically work against the clock to deliver petits fours to Paul and Mary's exacting standards.

Things are hotting up in the Bake Off tent as the remaining ten bakers do their best to wow Paul Hollywood and Mary Berry with some unusual flavour combinations for their tartes tatin.

Amateur bakers have their skills tested to the limit. The bakers face three challenges, all designed for a sweet tooth, including a mainstay of French baking - the creme caramel.

The bakers take on three sweet dough challenges.

The remaining bakers face a biscuit based quarter-final.

A year after taking part, we catch up with the bakers from series 2 of The Great British Bake Off. What was it really like to compete in the tent, be judged by Mary Berry and Paul Hollywood, and comforted by Mel Giedroyc and Sue Perkins? And how has their shared love of baking and appearing on the series changed their lives?

Mary Berry and Paul Hollywood show which signature bakes they would have chosen to make.

The bakers turn their attention to cooking perfect pies.

Paul Hollywood and Mary Berry show how to tackle treacle tarts and rum babas.

Recipes include the queen of puddings, chocolate tea cakes and jam doughnuts.

A chance to catch up with the bakers from series 2 of The Great British Bake Off.