Claudia Winkleman hosts the quarter-final of the Great British Sewing Bee, where the five remaining sewers sweat it out over activewear, creating complex, hard-wearing garments from the most technical of fabrics. For the pattern challenge, judges Patrick Grant and Esme Young ask the sewers to make a man's lycra cycling top, which requires expert handling of a fabric that stretches in all directions and a complex zip insertion that tests their patience. Next, for the alteration challenge, the sewers use all their ingenuity to transform garish 1980s ski suits into children's jackets. Finally, the made-to-measure challenge sees the sewers create the most fitted garments ever attempted on the Sewing Bee - yoga outfits - to secure one of four places in the semi-final.