The Great British Sewing Bee

Taking on the fast fashion industry, the second most polluting industry in the world, Sara Pascoe welcomes back Reduce Reuse Recycle week. First, the sewers attempt a zero-waste pattern for a pair of trousers, which involves complex mathematical skills to work out how to create the pattern pieces without leaving a scrap of waste fabric.

In the Transformation Challenge, the sewers use up a mountain of waste tote bags to create a garment. They can combine several bags to transform them in just 90 minutes, making imaginative use of the different prints and straps.

Finally, the sewers have been asked to source second-hand crochet blankets to create a made-to-measure outfit. They need to ensure that while chopping up their blankets, they don't unravel before they are sewn into outfits.