Question to the Department for Transport:

To ask the Secretary of State for Transport, if he will publish the Government's data on the level of NOx emissions and other pollutants produced by an (a) diesel and (b) petrol car registered after 2005 driving at (i) 5mph, (ii) 10mph, (iii) 15mph, (iv) 20mph, (v) 25mph, (vi) 30mph, (vii) 40mph, (viii) 50mph, (ix) 60mph and (x) 70mph.

The Government does not possess this specific data.

The Vehicle Certification Agency (VCA) has developed databases listing most of the cars and new vans available for sale in the UK. These databases are available online and inform buyers about the impact of the vehicle on the environment by giving fuel consumption information or identifying those that use alternative fuel types; in the car database, identifying the vehicle excise duty on individual vehicles based on their CO2 emissions; and in the van database, helping buyers to choose the correct vehicle for their requirements. The car database also provides information on the air quality pollutants and noise levels recorded as part of type-approval process but these only confirm that the car meets the required emissions standard and are not suitable for comparative purposes.

All national air quality monitoring data is available on the Government’s UK-Air website, which provides in-depth information on air quality and air pollution in the UK. A range of information is available, from the latest pollution levels, pollution forecast information, a data archive, and details of the various monitoring networks. This website is hosted and maintained by Ricardo Energy & Environment on behalf of Defra and the Devolved Administrations.