Welsh Government statisticians have published a joint work plan with the Office for National Statistics (ONS) to examine the differences between these data sources in greater detail.
Mae ystadegwyr Llywodraeth Cymru wedi cyhoeddi cynllun gwaith ar y cyd â’r Swyddfa Ystadegau Gwladol (ONS) i archwilio’r gwahaniaethau rhwng y ffynonellau data hyn yn fanylach.