The Great British Sewing Bee reaches its dramatic denouement, as the three finalists compete for the title of Britain's best amateur sewer, taking on a trio of challenges for special occasions. Bringing together a range of advanced sewing skills, from couture techniques to the handling of delicate luxury fabrics, perfecting occasion wear is a pinnacle for any home sewer. Judges Patrick Grant and Esme Young start by challenging the sewers to make a little girl's bridesmaid dress packed with complex elements including puff sleeves, a lined bodice and a bound buttonhole.Next, it's the sewers' final chance to show off their instinct for design in the Transformation Challenge. They attempt to turn homeware items such as cushions, bead curtains and table cloths into dramatic and fun outfits fit to wear at a summer festival.Lastly, for the most important Made to Measure challenge of the competition, the sewers attempt to construct and fit glamorous off-the-shoulder evening gowns for their models. Creating a unique, red-carpet-worthy gown using yards of luxury fabric is a feat of daring construction and requires their most precise sewing yet. Once the final stitch is in place and the catwalk is over, the judges will make their decision and crown this year's winner.