Special circumstances are uncommon or exceptional circumstances that should be clearly recognisable as such and are completely separate from the other considerations mentioned above.
Mae amgylchiadau arbennig yn amgylchiadau anghyffredin neu eithriadol y dylai fod modd eu hadnabod yn glir fel hynny a’u bod yn hollol ar wahân i’r ystyriaethau eraill a nodir uchod.