Politicians in Wales need to focus on improving the economy rather than being 'paralysed by never-ending constitutional debate' according to the Welsh Secretary.
Stephen Crabb will use a speech at Cardiff University's Business School to say that UK Government plans for more devolution will help Wales to continue 'punching above its weight on the global stage.'
But he'll make a coded attack on Assembly politicians including the First Minister, who have strongly criticised plans set out in a draft Wales Bill to change the powers of the Assembly and Welsh Government.
The Welsh Secretary is expected to warn against 'spending years locked in prolonged debates about the finer points of devolution' rather than making 'our nation’s economic future our number one priority.'
You can read extracts from his speech below: