Theresa May is preparing to formally ask the EU to delay Brexit, 1,000 days since Britons voted to leave the EU.
The prime minister will on Wednesday send a letter to Brussels revealing her preference for either a short or long extension of Article 50 – the legal mechanism to take the UK out of the bloc.
But she could face a potential cabinet split, and the threat that such a request will be rejected.
With just nine days until 29 March – the Brexit date Mrs May promised for years – she has not yet convinced MPs to ratify her deal.
But after Brexiteers and Remainers last week, and the Speaker, Mrs May promised to formally write a letter asking Brussels for a Brexit delay.
She will follow it up with a trip to the Belgian capital on Thursday for a summit with EU leaders.
The move threatens to tear her government apart, Bloomberg reporting pro-Brexit ministers met on Tuesday night to plan how they could block a long delay.