It's the semi-final with just four sewers left to battle it out to for a place in the final. All that stands in the way are three challenges designed by judges, Patrick Grant and Esme Young. This week they want to test the sewers' knowledge of complex patterns and pattern cutting. For the Pattern Challenge, the sewers are tasked with making an asymmetric yoked skirt inspired by modern Japanese pattern cutting.

The three finalists take on a trio of evening wear challenges. The judges begin by asking the sewers to follow the most complex pattern yet, a double-breasted waistcoat.

It's Week 7, and we’re going back to the 90s with cargo pants, 90s icon fancy dress and body-skimming supermodel dresses.

The fashion industry is the biggest polluter of our planet next to oil, so for the first time on The Great British Sewing Bee, it is Reduce, Reuse and Recycle Week.

With Joe Lycett hosting, the quarter-finalists face British and Irish fabrics week. Patrick Grant and Esme Young ask the sewers to create a ‘worker's jacket’ from linen.

Joe Lycett hosts the semi-final, as the four remaining sewers go global, taking on garments and techniques from around the world.

Amateur sewers test their sewing and dressmaking skills. The nine remaining amateur sewers are tested on their ability to make clothes on a miniature scale.

The fabrics in the haberdashery go technical, as the seven remaining home sewers take on man-made fabrics designed for sport and the great outdoors.

The competition reaches its dramatic denouement as the final three sewers tackle celebration wear challenges and the series winner is crowned.

Under the scrutiny of Savile Row's Patrick Grant and Central St Martin's Esme Young, ten fresh-faced home sewers face three challenges designed to test their skill and understanding of basic garment construction. First the sewers follow a pattern for a woman's top made up of four pieces.

With Joe Lycett hosting, the remaining home sewers head back in time to the 1970s, attempting to revive the glamorous, rebellious and sometimes ridiculous, style of the decade.

Amateur sewers test their sewing and dressmaking skills. It's the semi-final, and the five remaining sewers take on a set of tasks working with tricky and technical fabrics.

The competition reaches its conclusion as the three finalists enter the sewing room for the very last time, with the judges looking for cutting-edge designs.

Nine amateur sewers return, ready to show judges Patrick Grant and Esme Young that they can make beautiful clothes on a miniature scale. Claudia Winkleman sets the sewers three challenges, each designed to test different fabric handling skills on children's clothing.

Eight sewers return to the sewing room to take on delicate lingerie. The three demanding challenges require the sewers to work with the fiddliest of pattern pieces and the most delicate fabric. First they follow a pattern for a bra which proves testing for even the most dextrous of sewers, requiring precision engineering and some of the smallest pattern pieces ever seen in the sewing room.

Joe Lycett presents as the sewers create a 'wiggle dress' and transform three items of denim clothing, before having to fit real live models with made-to-measure jumpsuits.

Five sewers do battle in the quarter-final, where they must master techniques and styles from France, Spain and the Philippines.

For their semi-final challenge, the four remaining sewers go to the movies, taking on garments and techniques from the silver screen.

Joe Lycett kicks off ten weeks of the most perplexing patterns, eye-popping transformations and stunning made-to-measure garments yet.

The 11 remaining sewers return for holiday week and are challenged to create palazzo pants, beach cover-ups and colourful shirts.

It's sportswear week, and the sewers must create rugby shirts, waterproof onesies for toddlers and tennis outfits.

The eight remaining sewers return to the sewing room for lingerie and sleepwear week.

The six remaining home sewers head back in time to the 1980s, attempting to revive the glamorous - and sometimes ridiculous - style of that decade.

It’s Week 2, and there are three challenges inspired by sport. The sewers are asked to create a half zip fleece, an outfit from cricket kit and a national strip fit for the world stage.

It’s Week 3 of The Sewing Bee, and the sewers face three challenges inspired by travel. They are asked to create summer blouses from tablecloths, nautical bags and outfits fit for the French Riviera.