http://www.legislation.gov.uk/uksi/1992/1961/signature/madeThe A20 London–Folkestone–Dover Trunk Road (Sidcup Bypass Improvement Detrunking) Order 1992Roads and highwaysRoad buildingKing's Printer of Acts of Parliament2011-07-04HIGHWAYS, ENGLAND AND WALESSigned by authority of the Secretary of State for TransportI. YassRegional Director, London Region,Department of Transport7th August 1992