Peter Stokes, from the Office for National Statistics, says changing numbers of Welsh speakers in different parts of the country can partly be explained by migration within Wales.
More top news
Three elderly people are being treated for the effects of smoke inhalation following fire at a nursing home in Denbighshire
A few showers possible, but these tending to fade. Cloud will break up allowing a frost to form. Some patchy mist and fog may also develop.
The 48-year-old lecturer was taken to the University Hospital of Wales, Cardiff, where he sadly died.