http://www.legislation.gov.uk/uksi/2005/1150/signature/madeThe A428 Trunk Road (Caxton Gibbet to Cambourne Improvement) (Detrunking) Order 2005Roads and highwaysRoad buildingKing's Printer of Acts of Parliament2011-07-04HIGHWAYS, ENGLANDSigned by authority of the Secretary of State for TransportPeter WallworkDivisional Director Highways Agency17th March 2005