29 cognitive interviews were then held over Microsoft Teams or Zoom with participants across Wales, in three stages between 4 August and 29 October 2021.
Cynhaliwyd gwaith maes ar gyfer ton Mawrth 2021 o Arolwg Omnibws Cymru ym mis Mawrth 2021 rhwng 2 a 9 Mawrth 2021.