Johnson Matthey Plc. revised earnings guidance for the first half and the year ending 31 March 2020. Group guidance at constant rates, for the first half and the year remains unchanged. The company expects growth in operating performance at constant rates to be within the company medium term guidance of mid to high single digit growth. At current foreign exchange rates translational foreign exchange movements for the year ending 31 March 2020 are expected to benefit sales by £128 million and underlying operating profit by £21 million.