http://www.legislation.gov.uk/wsi/2012/1130/madeThe A470, A40, A479 & A483 Trunk Roads (Various Locations in the Counties of Merthyr Tydfil, Brecon and Powys) (Temporary Prohibition of Vehicular and Non Vehicular Traffic) Order 2012Gorchymyn Cefnffyrdd yr A470, yr A40, yr A479 a'r A483 (Lleoliadau Amrywiol yn Siroedd Merthyr Tudful a Phowys) (Gwahardd Dros Dro Draffig Cerbydol a Thraffig nad yw'n Gerbydol) 2012King's Printer of Acts of Parliament2012-04-26