The country's best young bakers go head to head. Sam and Mark host as the second batch of quarter-finalists enter the Bake Off tent to face judges Graham Hornigold and Allegra McEvedy. Each of the five young hopefuls competing for the last three places in the semi-final must produce one of Allegra's recipes for a meringues-en-bouche - a wedding centrepiece where they are required to make over a hundred multi-coloured meringues. All against the clock. Their pastry-making skills are also fully tested with show-stopping mini tarts which must have a scary theme.