Wales' First Minister, Carwyn Jones, says the UK Government has been dragged "kicking and screaming" to proposals for a "sensible" post-Brexit relationship with the EU.
He said the UK Government’s white paper is a significant change of direction.
Mr Jones added: "It is a source of regret that the UK Government has, again, had to be dragged kicking and screaming to this sensible approach, but today’s movement must at least receive a cautious welcome.
“However, far too many questions remain unanswered and some proposals – such as a twin track customs systems – appear unworkable."
The 98-page white paper, agreed at a Cabinet summit at Chequers last week which led Boris Johnson and David Davis to quit the Government, outlines UK proposals for what Prime Minister Theresa May describes in a foreword as “a principled and practical Brexit that is in our national interest and the UK’s and the EU’s mutual interest”.
Mr Jones added: “I will discuss the EU’s reaction to the proposals with Michel Barnier when I meet with him in Brussels on Monday. I will also take the opportunity to set out where we believe a flexible approach from the EU27 is needed to avoid the catastrophic ‘no deal’ scenario.”