The Supreme Court made a very clear judgment on Wednesday, November 23: if Scotland wants to hold an independence vote, then Westminster's permission is needed. A decision on what Scotland can and can't do is bound to have a ripple effect on Wales - and could limit any attempts for Welsh independence or further devolution.
The judgment has already caught the attention of politicians in the Senedd, and it could be key to Wales' constitutional future. It's worth diving in to what effect it could have, starting with what the judgment actually means.
The Supreme Court effectively had to answer the question: "Would a Bill that brought about an independence referendum be within the Scottish Parliament's powers?" The answer, basically, was: "No."