This change in timing may have had an effect on the match rate between the WDSD and PLASC and EOTAS data but it is not possible to determine whether this would have been a positive or negative effect.
Mae’n bosibl bod y newid hwn mewn amseru wedi cael effaith ar y gyfradd baru rhwng data WDSD a CYBLD ac EOTAS ond nid yw’n bosibl pennu a fyddai hyn wedi cael effaith gadarnhaol neu negyddol.