Sir Roger Martyn Carr (born 22 December 1946) is a British businessman who is regarded as one of the growing number of "Double Chairmen" who head two companies in Britain s benchmark FTSE 100 index. Overall he has been on the board of eight companies. Carr's first time on a company board came in 1994 when he was made CEO of Williams Holdings, he later became chairman of Thames Water in 1998. In 2000 he was forced to resign as CEO of Williams Holdings as the company went defunct. The company however demerged into Chubb and Kidde, Carr became the chairman of Chubb. Also in 2000 he stepped down as chairman of Thames Water. In 2003 he became the chairman of Michells and Butler, a British company that owns over 2,000 pubs and restaurants, he resigned in 2008 and in June of the same year became the chairman of Cadbury plc, the United Kingdom's largest confectionery manufacturer.