http://www.legislation.gov.uk/uksi/1989/1862/signature/madeThe Newtown-Aberystwyth Trunk Road (A489) (Mochdre Roundabout, Newtown) Order 1989Roads and highwaysRoad buildingFurther and higher educationFurther education collegesKing's Printer of Acts of Parliament2011-07-04HIGHWAYS, ENGLAND AND WALESSigned by authority of the Secretary of StateH. R. BollingtonAn Assistant SecretaryWelsh Office4th October 1989