Royston, Hertfordshire, England, United Kingdom
Johnson Matthey plc. In recognition of the 40th anniversary of the world's first commercial autocatalysts being manufactured on this site, and the subsequent development of catalysts and filters for gasoline and diesel vehicles that have cleaned billions of tonnes of pollutants from the environment
Listen to the audio guide for Johnson Matthey plc blue plaque Free on WIP — starts by itself when you arrive, even with the screen off