Published 26 July 2017
Last updated 21 December 2017
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Updated the supporting document for 2017 directions to include the directions for Birmingham City Council, Derby City Council, Leeds City Council, Nottingham City Council and Southampton City Council.
Added the Welsh translation of the detailed plan document, and a link to the published zone plans.
Direction to local authorities added: the Environment Act 1995 (Feasibility Study for Nitrogen Dioxide Compliance) Air Quality Direction 2017.