European and Welsh law require the Welsh Government to consider a variety of options with an open mind in its transport planning in order to make sure that unnecessary environmental damage is avoided.
We don’t think they’ve done that - and we’re willing to seek a judge’s opinion on the Welsh Government’s ability to comply with the law.
More top news
There'll be a few wintry showers over the hills tonight but these will ease to leave frost and ice in places.
Missed Wednesday's Wales at Six? You can catch up here.
Amazon workers in Swansea say these claims are "hearsay" and they "put safety first".