Turnaround times were effected by planned maintenance of the Welsh Laboratory Information Management System (WLIMS) system on the week beginning 7 December 2020.
Gwybodaeth reoli a dynnwyd o systemau ysgolion yng Nghymru ar ddisgyblion sy'n bresennol mewn ysgolion a gynhelir a Unedau Cyfeirio Disgyblion o 7 Medi 2020 ymlaen.