English: building preservation order
Welsh: gorchymyn cadw adeilad 
Subject: Cynllunio
English definition: A notice under Section 3 of the Planning (Listed Buildings and Conservation Areas) Act 1990 to protect buildings of special architectural or historic interest from demolition or alterations that would affect their interest.
Welsh definition: Hysbysiad o dan Adran 3 o Ddeddf Cynllunio (Adeiladau Rhestredig ac Ardaloedd Cadwraeth) 1990 i warchod adeiladau o ddiddordeb pensaernïol neu hanesyddol arbennig rhag cael eu dymchwel neu newidiadau fyddai'n effeithio ar eu diddordeb.