The structure of this supplement broadly follows that of the 1994 M5 East EIS, and subjects are generally discussed in the same order as they were in the 1994 M5 East EIS. This has been done so as to facilitate cross-reference to the 1994 M5 East EIS. This supplement sets out, in order, the results of the community involvement, development and consideration of alternatives, a detailed description of the Variation and the assessment of its impacts. In discussing the impacts, the subjects have been grouped into the following categories: Assessment of impacts on, and proposed safeguards for transport. Assessment of impacts on, and proposed safeguards for the social environment. Assessment of impacts on, and proposed safeguards for the natural environment. This supplement then sets out the assessment of the impacts of the Variation under the following headings: Description of the Variation and assessment of its impacts. Comparison between the Variation and the 1994 M5 East EIS proposal (both the shorter tunnel and the extended tunnel).