The Midlands-based knitwear division of UK-based manufacturer, Charnos Plc (CK), has been sold to Richard Roberts Knitwear Ltd (RRK) for an undisclosed sum, the companies have announced. After several years of turmoil in the knitwear industry both businesses have emerged as two of the UK's largest knitwear manufacturers and count high street giant Marks & Spencer among their customers.