To ask the Secretary of State for Transport what information he has about the relative cost implications to the motor industry of fitting large or small carbon canisters to motor vehicles; and if he will make a statement.

Carbon canisters are used to control evaporative emissions from motor vehicles. The component cost is likely to range between £15 and £40. The cost of installation is difficult to estimate, but is likely to be higher for the larger canisters that are designed to capture refuelling emissions, because they are more sophisticated and require electronic controls.