This change in practice has been in place since 1 January 2021 and is a result of the UK's independent membership of the WTO Agreement on Government Procurement (GPA).
Mae'r newid hwn mewn ymarfer wedi bod ar waith ers 1 Ionawr 2021 ac mae'n deillio o aelodaeth annibynnol y DU o’r Gytundeb ar Gaffael gan Lywodraethau Sefydliad Masnach y Byd.