Doesn't look good over at Nanoco. May 18 (Reuters) - Nanoco Group Plc : * Chairman, Tony Clinch, has resigned as a director after six years on company's board ADVERTISEMENT * Chris Richards, who joined Nanoco's board as a non-executive director in november 2015, has been appointed chairman * Above board changes are taking place with immediate effect Source text for Eikon: Further company coverage: (Bengaluru Newsroom: +91 806 749 1136) http://mobile.reuters.com/article/idUSFWN18E0QY