The 4 schools were not included in the original release because their authorised data had not been received and we did not discover the omission during our original validation process.
Ni chafodd y 4 ysgol eu cynnwys yn y datganiad gwreiddiol oherwydd na chyflwynwyd eu data awdurdodedig i ni mewn pryd ac ni wnaethom ddarganfod yr hepgoriad yn ystod ein proses ddilysu wreiddiol.