Exhaust system maker Bosal has developed a combined oxidation catalyst and diesel exhaust particulate filter.  
 
Called Oxycat, the new unit will typically cut a Euro 3 vehicle's particulate emissions to Euro 4 levels. The firm says the device is maintenance-free and can be retrofitted to vans and light trucks up to 3.5 tonnes GVW.  

"We're already selling well on the Continent where several countries offer incentives to operators that cut emissions," says Andrew McCrea, UK managing director for the firm. With issues like the London Low Emission Zone and its emission-based entry standards, McCrae and his colleagues think the Oxycat may prove a cost-effective way to upgrade vehicles to meet tougher standards.  

"Unlike some the devices on the market, ours costs well under £500, is entirely maintenance and comes with a three-year guarantee."