David Davis tells the BBC "nothing comes for nothing" and France and Germany need to give ground too.
The prime minister is hoping the EU will agree to start talking about a trade deal.
Leo Varadkar wants talks stalled until there is commitment to no physical barriers at Irish border.
Lloyd Blankfein tweets that many want a "confirming vote" on a "monumental and irreversible" decision.
What we learned about the Leave result
Will pets be able to travel after Brexit?
Explaining the stages through Parliament
The people who will negotiate Brexit
Food imports into the EU and the UK after Brexit
European Court of Justice: A quick explainer
Is a last-minute Brexit deal possible?
Why a Brexit transition may not buy time
A guide to the main negotiation areas.
Where borders combine hi-tech and collaboration