Keep the commercial status of dual cab pickup trucks rather than re-classifying them as passenger cars, for those using them for agriculture or construction. They are so important.
Some businesses may not be able to afford double cab pickups on a company car tax basis, yet single cabs may not be as useful for working in these industries. The tax status change could lead to more people driving separately, which is worse for the environment. Also, dual cabs are often built to specifications that enable them to tow a heavier weight.