Di Gilpin and Sheila Greenwell are knitwear designers and teachers based in Scotland. Di has worked for numerous yarn companies including Rowan for whom she created the Rowan Scottish Tweed yarn, and collaborated with lots of designers including Cabbages & Roses; Topshop Unique and Nike and Wolsey. Di and Sheila run a hand knitting design studio where they run regular knitting workshops. Together they joined Tom Daley as the judges on the reality TV show to find Britain's Best Knitter, The Game of Wool.