Cyhoeddodd ein Grŵp Cynghori Technegol grynodeb o'r dystiolaeth ynglŷn â hyn a'r sefyllfa o ran addysg ar 8 Ionawr[1]. Er bod hyn wedi'i anelu'n bennaf at leoliadau addysg, mae llawer o'r canfyddiadau'n berthnasol i ofal plant.
Our Technical Advisory Group published a summary of the evidence regarding this and the position with regards to education on 8 January[1].  While this is largely aimed at education settings, many of the findings are relevant to childcare.