Sort ascending by Teitl | Blynyddoedd a Rhifau | Sort ascending by Math o ddeddfwriaeth |
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The Newtown-Aberystwyth Trunk Road (A489) (Mochdre Roundabout, Newtown) Order 1989 | 1989 No. 1862 | Offerynnau Statudol y Deyrnas Unedig |
The Cardiff-Glan Conwy Trunk Road (A470) The Newtown-Aberystwyth Trunk Road (A44) (Trunk Roads and Junction Improvements, Llangurig) Order 1989 | 1989 No. 1661 | Offerynnau Statudol y Deyrnas Unedig |