Following Estyn’s inspection of Torfaen’s education services in October 2011 the authority was identified as requiring Significant Improvement.
Cefais wybod ym mis Hydref 2012 fod Estyn, ar ôl cynnal arolygiad o dan Adran 28 o Ddeddf Addysg 2005, o’r farn bod angen mesurau arbennig ar Ysgol Uwchradd Llanrhymni.