Upcycling: how you get fashion from cast-offs

Marks & Spencers have launched a new Shwopping scheme that has put 'upcycling', the process of making new clothes out of old, in the spotlight. But TRAID have been at it for years! And the ethical high street charity shop has raised over 30 million since launching in 1999. So how do the donations go from cast-offs to new designs? Follow a pair of old curtains and watch them become a covetable item