http://www.legislation.gov.uk/wsi/2017/968/madeThe A483 Trunk Road (Llanddewi Ystradenni to Newtown, Powys) (Temporary Prohibition of Vehicles) Order 2017Gorchymyn Cefnffordd yr A483 (Llanddewi Ystradenni i’r Drenewydd, Powys) (Gwahardd Cerbydau Dros Dro) 2017King's Printer of Acts of Parliament2017-10-06