It is over half way through the experiment and now just six workers remain. This time, they are working in manufacturing - a sector that has been in decline in the UK but is showing signs of a revival. What does it take to make the grade working in a car parts company and who will cut it in the textile industry? While the workers get to grips with the levels of skill demanded of them - and all for minimum wage - Anita Rani is finding out why Britain's productivity lags so far behind other G7 nations and whether we want more manufacturing jobs here at all.