BBC News
By Ione Wells
image copyrightGetty Images
image captionIn Wales, independence is still a minority view, but a campaign aimed at making it a reality has gained momentum in the past year
In the past few years, debate has raged about whether the United Kingdom faces a future without Scotland.
Polls have suggested for months that support for Scottish independence has been higher than for Scotland staying in the UK.
In Wales, independence is still a minority view, but a campaign aimed at making it a reality has gained momentum in the past year.
Now, a former adviser to David Cameron on devolution says there is "no room for complacency" about support for the union in Wales.