Talks between the UK and EU over a post-Brexit trade deal will enter their third round later, ahead of a decisive summit next month.
Both sides are due to decide by the end of June whether the current deadline for negotiating an agreement should be extended beyond the end of December.
The UK has said it will not agree to an extension, even if the EU requests one.
The latest round of talks, to be held via video link, will end on Friday.
After the latest round in April, EU chief negotiator Michel Barnier said progress had been disappointing, whilst the UK said only “limited progress” had been made.
There are differences between the two sides on fisheries, competition rules, police co-operation, and how a deal would be enforced.