Overview: Nadiya and Allegra give four more junior bakers, Lottie, Harry, Ffion and Mehdi, the chance to compete for just one place in the quarter-finals. The technical challenge is one of Allegra's recipes for pizzetta bianchi. Which baker will achieve pizza perfection with these thin, mini white pizzas? Next the bakers have to invent a dessert in show-stopping cake form. Expect blackberry crumbles, lemon meringue pies and even jelly and ice cream to be transformed into cake.