Britain and the European Union are "almost within touching distance" of a Brexit deal after another late-night negotiating session, a close ally of Prime Minister Theresa May said on Tuesday.

Cabinet Office Minister David Lidington effectively the UK's deputy prime minister said it's "possible but not at all definite" that the two sides can reach agreement this week. "We are not quite there yet," Lidington told the BBC. "This was always going to be an extremely difficult, extremely complex negotiation, but we are almost within touching distance now."