Johnson Matthey PLC (LON:JMAT)’s full-year underlying sales rose 5%, ignoring the effect of currency changes, to £3.8bn. That was driven by a partial recovery in Clean Air and good performance from Efficient Natural Resources. Underlying operating profit, which excludes £440m of impairment and restructuring charges related to the disposal of the Health and Battery businesses, rose 21% to £553m. Q1 2022 hedge fund letters, conferences and more The group warned “visibility is low and the outcome for the year remains uncertain” and have guided for 2022/23 full year underlying operating profit in …