He said: 'This means that the vote on consent for the Withdrawal Bill at Holyrood today need not be the final word on this matter - there is still time to fix this mess'.
However, Scottish Government Brexit minister Michael Russell has put forward a motion stating that Holyrood will refuse permission for the changes on the grounds it would "constrain the legislative and executive competence of the Scottish Parliament and Scottish Government". At the same time she's struggling to unite her Cabinet over what kind of relationship the United Kingdom should maintain with Europe, while trying to head off a mutiny by some of her lawmakers.
The prime minister now has to decide whether to press ahead despite the vote or make renewed efforts for some kind of compromise.
The EU chief Brexit negotiator Michel Barnier, left, and Scottish First Minister Nicola Sturgeon prepare for a meeting at EU headquarters in Brussels, last year. It also risks playing into the hands of the nationalists who are trying to build a case for another independence referendum.
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Westminster has never before tried to legislate in devolved areas without the backing of Holyrood, however, so it is not clear what will happen next.
The UK voted as a whole to leave the European Union in June 2016, but Scotland voted to remain.
Public talk of defying Brexit, though, dissipated after Ms. The Scottish Conservatives pushed hard for these changes and we are pleased to support them.
The Scottish Parliament and Westminster have been at loggerheads for months over how to manage European Union powers that will return to Britain after Brexit, including over state aid for industry, genetically modified crops policy, fishing quotas and farm subsidies, after ministers in London made a series of concessions brokered by the Scottish Conservatives. "It becomes about self-governance". The UK ceded more autonomy as part of promises made during 2014's independence referendum campaign.
At issue is a bitter dispute between Westminster and Holyrood over powers now held by Brussels, which the SNP wants devolved after Brexit.
Mr Russell will now write to David Lidington, calling on him come to Scotland to "hear the concerns of all parties and to discuss with the Scottish Government and the UK Government any new ideas from any of the parties".