http://www.legislation.gov.uk/uksi/2012/3214/madeThe M25 Motorway and the A13 and the A282 Trunk Roads (Junction 30) (Temporary 50 Miles Per Hour Speed Restriction) Order 2012King's Printer of Acts of Parliament2013-01-04 The M25 Motorway and the A13 and the A282 Trunk Roads (Junction 30) (Temporary 50 Miles Per Hour Speed Restriction) Order 2012OrderThe M25 Motorway, the A13 Trunk Road and the A282 Trunk Road (M25 Junctions 30 - 31) (Temporary Restriction and Prohibition of Traffic) Order 2013art. 7art. 1