Cleantech Building Materials plc announced the appointment of Ms. Briony Mathieson to the company?s Board of Directors (the ?Board?) as a Non-executive Director with immediate effect. Ms. Mathieson has 30 years? experience in communications, marketing and sustainability across multiple industry sectors. Since 2011 she has worked at Olam International, and is currently Chief Marketing Officer of one of its principal operating divisions, having previously been Head of Global Communications.