To provide an indication of the potential size of the UK population for a more recent time point, the ONS has created five international migration scenarios for the six months to the end of 2020.
Er mwyn rhoi syniad o faint posibl poblogaeth y DU ar gyfer cyfnod mwy diweddar, mae'r ONS wedi creu pum senario mudo rhyngwladol am y chwe mis hyd at ddiwedd 2020.