Although this inconsistency in the reporting of AU activity was identified for the 2012-13 release, it is likely that historic data could also be affected.
Er y nodwyd yr anghysondeb hwn yn y dulliau adrodd gweithgarwch AU ar gyfer datganiad 2012-13, mae’n debygol y gallai’r data hanesyddol hwn gael ei effeithio hefyd.