More talks are scheduled in Brussels today as British ministers continue their attempts to secure changes to the Irish backstop in Brexit negotiations.
The UK's attorney general Geoffrey Cox and Brexit secretary Stephen Barclay are meeting with the EU's chief Brexit negotiator Michel Barnier.
The backstop to avoid a hard border in Ireland remains the key sticking point.
There remains strong opposition to the 'insurance policy' in Westminster.
In January, MPs called for Theresa May's government to seek 'alternative arrangements' to the proposed backstop.
Mr Barclay has previously said he and Mr Barnier have committed 'working together to solve the backstop'.
Productive conversations with @MichelBarnier, with a commitment to work together to solve the backstop. I’ll update my colleagues in Cabinet tomorrow.
— Steve Barclay (@SteveBarclay) February 18, 2019
EU officials have repeatedly ruled out the prospect of renegotiating the withdrawal agreement.
In comments published over the weekend, however, Mr Barnier said: "We are ready to give further guarantees, assurances and clarifications that the backstop should only be temporary."
He stressed: "We will not reverse the backstop. It's an insurance.
"We don't want to make use of it. And this is also the case when you insure your house. It's only intended for the worst-case scenario."
Meanwhile, MPs in Westminster will vote again on the withdrawal agreement next week.
If they again reject the deal and any changes secured, they'll be asked whether they approve a no-deal Brexit.
If that's ruled out, a third vote will see them asked whether they agree to a short delay to Brexit to allow for further negotiations.
The EU will need to sign off on any extension to Article 50.
Theresa May has insisted it's still possible for the UK to leave the EU as planned on March 29th if her withdrawal agreement is approved.
Last week, Taoiseach Leo Varadkar indicated he doesn't believe the UK will crash out of the bloc at the end of the month.
He suggested there'll either be a deal reached or an extension agreed to avoid a no-deal Brexit.