|Images of non-household returns have gone missing|
They were there under 'View census images'. And now they aren't.
I'm told that the matter has been referred to the NAI's web team and a fix is awaited. So the data is not lost. The images are just temporarily unavailable.
UPDATE: 10 April 9:25am: Speedy reaction from the National Archives of Ireland's web crew... the images have been restored to their rightful place, as per below: