Grafenia plc announced that Les Wheatley has advised the board that with immediate effect he is stepping down as Chairman of the company and resigning as a Non-executive Director. The board will be reviewing the available options for the appointment of a new Chairman and will advise the market in due course. However, they have confirmed the Board's size will reduce as no replacement will be recruited. Existing non-executive directors of the company will rotate and chair Board Meetings on an interim basis.