A year ago, Mary Portas launched her most ambitious and challenging project to date: to help reignite the UK's clothing industry by starting her own production line, manufacturing British knickers. In this brand new episode, with spring / summer knicker sales going through the roof and autumn / winter pre-orders exceeding expectations, Mary's dream to bring clothing manufacturing back to Britain seems to be coming true. She also examines how other parts of the British textile industry can be transformed with the help of British-based manufacturing. She also roadtests her anti-cellulite knicker prototype on the bottoms of a group of factory workers from a local biscuit-making factory factory workers from a local biscuit-making factory.