Two decades after the material was first produced, some UK firms have reaped its potential but others are struggling Two decades after the material was first produced, some UK firms have reaped its potential but others are struggling A fter graphene was first produced at the University of Manchester in 2004, it was hailed as a wonder material , stronger than steel but lighter than paper. But two decades on, not every UK graphene company has made the most of that potential. Some show promise but