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Vehicle Emissions

Volume 458: debated on Monday 26 March 2007

To ask the Secretary of State for Transport by what date he expects to approve technology and testing standards for equipment that could be fitted to vehicles to abate emissions of nitrogen oxide in relation to the enforcement to Euro IV standards. (129855)

Euro IV standards are mandatory for all new cars, vans, lorries and buses registered in the United Kingdom, and indeed Europe. Test procedures are therefore already in place for type approval to these standards.

Diesel lorries and buses meeting earlier Euro standards are eligible for reduced road tax if they have been retrofitted to reduce their particulate emissions (but not NOx emissions) to Euro IV levels. Such retrofit emissions control devices are approved through the Reduced Pollution Certificate scheme.

The Chancellor of the Exchequer has recently announced that the Reduced Pollution Certificate scheme will be extended to offer reduced road tax to lorries and buses meeting the Euro V standards ahead of the date that this becomes mandatory (1 October 2009). Euro V differs from Euro IV solely in terms of the limits on oxides of nitrogen emissions. The exact details of the requirements for issuing Reduced Pollution Certificates to Euro V compliant vehicles, including any test procedures required, have not yet been decided.